Buffer overflow in Zyxel ATP series firmware
Priority CRITICAL 100Exploited in the wildCWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.60 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.60 through 5.36 Patch 1, VPN series firmware versions 4.60 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.60 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.
Why it matters now
Exploitation Active In CISA KEV since 2023-06-05CISA due date 2023-06-26
EPSS 0.28144 98th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Active
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Zyxel | ATP series firmware | 4.60 through 5.36 Patch 1 | — | No fix listed | CNA |
| Zyxel | USG FLEX series firmware | 4.60 through 5.36 Patch 1 | — | No fix listed | CNA |
| Zyxel | USG FLEX 50(W) firmware | 4.60 through 5.36 Patch 1 | — | No fix listed | CNA |
| Zyxel | USG20(W)-VPN firmware | 4.60 through 5.36 Patch 1 | — | No fix listed | CNA |
| Zyxel | VPN series firmware | 4.60 through 5.36 Patch 1 | — | No fix listed | CNA |
| Zyxel | ZyWALL/USG series firmware | 4.60 through 4.73 Patch 1 | — | No fix listed | CNA |
- ATP series firmware VendorZyxel Affected 4.60 through 5.36 Patch 1 Fixed in — No fix listed CNA
- USG FLEX series firmware VendorZyxel Affected 4.60 through 5.36 Patch 1 Fixed in — No fix listed CNA
- USG FLEX 50(W) firmware VendorZyxel Affected 4.60 through 5.36 Patch 1 Fixed in — No fix listed CNA
- USG20(W)-VPN firmware VendorZyxel Affected 4.60 through 5.36 Patch 1 Fixed in — No fix listed CNA
- VPN series firmware VendorZyxel Affected 4.60 through 5.36 Patch 1 Fixed in — No fix listed CNA
- ZyWALL/USG series firmware VendorZyxel Affected 4.60 through 4.73 Patch 1 Fixed in — No fix listed CNA
CPE configurations NVD · 92
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:atp100_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:atp100_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:atp200_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:atp200_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:atp500_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
- cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:atp100_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:atp100_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:atp200_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:atp200_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:atp500_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
Show 82 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:zyxel:atp500_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:atp100w_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:atp100w_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:atp100w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:atp700_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:atp700_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:atp700:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:atp800_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:atp800_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:atp800:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_100_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_100_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_50_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_50_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_flex_50:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_200_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_200_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_flex_200:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_500_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_500_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_flex_500:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_700_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_700_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_flex_700:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_100w_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_100w_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_flex_100w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_50w_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_50w_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_flex_50w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_20w-vpn_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_20w-vpn_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_20w-vpn_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_20w-vpn:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:vpn100_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:vpn100_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:vpn100_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:vpn100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:vpn50_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:vpn50_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:vpn50_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:vpn50:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:vpn300_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:vpn300_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:vpn300_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:vpn300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:vpn1000_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:vpn1000_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:vpn1000_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:vpn1000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg20-vpn_firmware:*:*:*:*:*:*:*:* | 4.60 to before 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg20-vpn_firmware:5.36:-:*:*:*:*:*:* | 5.36 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg20-vpn_firmware:5.36:patch1:*:*:*:*:*:* | 5.36 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg20-vpn:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_40_firmware:*:*:*:*:*:*:*:* | 4.60 to before 4.73 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_40_firmware:4.73:-:*:*:*:*:*:* | 4.73 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_40_firmware:4.73:patch1:*:*:*:*:*:* | 4.73 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_40:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_40w_firmware:*:*:*:*:*:*:*:* | 4.60 to before 4.73 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_40w_firmware:4.73:-:*:*:*:*:*:* | 4.73 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_40w_firmware:4.73:patch1:*:*:*:*:*:* | 4.73 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_40w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_60w_firmware:*:*:*:*:*:*:*:* | 4.60 to before 4.73 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_60w_firmware:4.73:-:*:*:*:*:*:* | 4.73 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_60w_firmware:4.73:patch1:*:*:*:*:*:* | 4.73 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_60w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_60_firmware:*:*:*:*:*:*:*:* | 4.60 to before 4.73 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_60_firmware:4.73:-:*:*:*:*:*:* | 4.73 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:usg_60_firmware:4.73:patch1:*:*:*:*:*:* | 4.73 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_60:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
- cpe:2.3:o:zyxel:atp500_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:atp100w_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:atp100w_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:atp100w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:atp700_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:atp700_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:atp700:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:atp800_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:atp800_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:atp800:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_100_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_100_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_50_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_50_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_flex_50:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_200_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_200_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_flex_200:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_500_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_500_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_flex_500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_700_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_700_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_flex_700:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_100w_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_100w_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_flex_100w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_50w_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_50w_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_flex_50w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_20w-vpn_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_20w-vpn_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_20w-vpn_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_20w-vpn:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:vpn100_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:vpn100_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:vpn100_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:vpn100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:vpn50_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:vpn50_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:vpn50_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:vpn50:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:vpn300_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:vpn300_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:vpn300_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:vpn300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:vpn1000_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:vpn1000_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:vpn1000_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:vpn1000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg20-vpn_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg20-vpn_firmware:5.36:-:*:*:*:*:*:* Versions 5.36 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg20-vpn_firmware:5.36:patch1:*:*:*:*:*:* Versions 5.36 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg20-vpn:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_40_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 4.73 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_40_firmware:4.73:-:*:*:*:*:*:* Versions 4.73 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_40_firmware:4.73:patch1:*:*:*:*:*:* Versions 4.73 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_40:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_40w_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 4.73 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_40w_firmware:4.73:-:*:*:*:*:*:* Versions 4.73 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_40w_firmware:4.73:patch1:*:*:*:*:*:* Versions 4.73 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_40w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_60w_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 4.73 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_60w_firmware:4.73:-:*:*:*:*:*:* Versions 4.73 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_60w_firmware:4.73:patch1:*:*:*:*:*:* Versions 4.73 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_60w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_60_firmware:*:*:*:*:*:*:*:* Versions 4.60 to before 4.73 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_60_firmware:4.73:-:*:*:*:*:*:* Versions 4.73 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:usg_60_firmware:4.73:patch1:*:*:*:*:*:* Versions 4.73 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_60:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
Remediation
No fixed version listed by the sources yet.
Timeline
- 2023-06-05 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2023-33009
- 2026-10-03 Alias added: GHSA-g3f9-6h7x-x69v
References
More Zyxel Atp100 Firmware vulnerabilities
- TI-2023-16198 Buffer overflow in Zyxel ATP series firmware KEVCVSS 3.1CRITICAL 9.8
- TI-2023-13281 OS command injection in Zyxel ZyWALL/USG series firmware KEVCVSS 3.1CRITICAL 9.8
- TI-2022-12682 OS command injection in Zyxel USG FLEX 100 firmware KEVCVSS 3.1CRITICAL 9.8
- TI-2020-17772 Firmware version 4.60 of Zyxel USG devices contains an undocumented account (zyfwp) with… KEVCVSS 3.1CRITICAL 9.8
- TI-2020-07267 OS command injection in Zyxel NAS326 KEVCVSS 3.1CRITICAL 9.8
- TI-2022-00268 Improper authentication in Zyxel USG/ZyWALL series firmware CVSS 3.1CRITICAL 9.8
Sources
- CVE-2023-33009 · CVE Program
- CVE-2023-33009 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-g3f9-6h7x-x69v · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences