OS command injection in Zyxel ZyWALL/USG series firmware
Priority LOW 39CWE-78Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- 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-78.
Summary
A post-authentication command injection vulnerability in the CLI command of Zyxel ZyWALL/USG series firmware versions 4.20 through 4.72, VPN series firmware versions 4.30 through 5.32, USG FLEX series firmware versions 4.50 through 5.32, and ATP series firmware versions 4.32 through 5.32, which could allow an authenticated attacker with administrator privileges to execute OS commands.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02829 86th 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
- None
- Automatable
- No
- 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 | ZyWALL/USG series firmware | 4.20 through 4.72 | — | No fix listed | CNA |
| Zyxel | VPN series firmware | 4.30 through 5.32 | — | No fix listed | CNA |
| Zyxel | USG FLEX series firmware | 4.50 through 5.32 | — | No fix listed | CNA |
| Zyxel | ATP series firmware | 4.32 through 5.32 | — | No fix listed | CNA |
- ZyWALL/USG series firmware VendorZyxel Affected 4.20 through 4.72 Fixed in — No fix listed CNA
- VPN series firmware VendorZyxel Affected 4.30 through 5.32 Fixed in — No fix listed CNA
- USG FLEX series firmware VendorZyxel Affected 4.50 through 5.32 Fixed in — No fix listed CNA
- ATP series firmware VendorZyxel Affected 4.32 through 5.32 Fixed in — No fix listed CNA
CPE configurations NVD · 50
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:* | 4.32 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:* | 4.32 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:* | 4.32 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:atp700:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:* | 4.32 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:* | 4.32 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:atp100w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
- cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:* Versions 4.32 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:* Versions 4.32 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:* Versions 4.32 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:atp700:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:* Versions 4.32 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:* Versions 4.32 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:atp100w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
Show 40 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:* | 4.32 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:atp800:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:* | 4.50 – 5.32 | 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:*:*:*:*:*:*:*:* | 4.50 – 5.32 | 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:*:*:*:*:*:*:*:* | 4.50 – 5.32 | 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:*:*:*:*:*:*:*:* | 4.50 – 5.32 | 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:*:*:*:*:*:*:*:* | 4.50 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_flex_100w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:* | 4.50 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:vpn1000_firmware:*:*:*:*:*:*:*:* | 4.30 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:vpn1000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg20w-vpn_firmware:*:*:*:*:*:*:*:* | 4.30 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg20w-vpn:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg20-vpn_firmware:*:*:*:*:*:*:*:* | 4.30 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg20-vpn:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:vpn50_firmware:*:*:*:*:*:*:*:* | 4.30 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:vpn50:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:vpn300_firmware:*:*:*:*:*:*:*:* | 4.30 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:vpn300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:vpn100_firmware:*:*:*:*:*:*:*:* | 4.30 – 5.32 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:vpn100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg40_firmware:*:*:*:*:*:*:*:* | 4.20 – 4.72 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg40:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg40w_firmware:*:*:*:*:*:*:*:* | 4.20 – 4.72 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg40w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg60_firmware:*:*:*:*:*:*:*:* | 4.20 – 4.72 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg60:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg60w_firmware:*:*:*:*:*:*:*:* | 4.20 – 4.72 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg60w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:zywall_110_firmware:*:*:*:*:*:*:*:* | 4.20 – 4.72 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:zywall_110:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:zywall_1100_firmware:*:*:*:*:*:*:*:* | 4.20 – 4.72 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:zywall_1100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:zywall_310_firmware:*:*:*:*:*:*:*:* | 4.20 – 4.72 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:zywall_310:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
- cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:* Versions 4.32 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:atp800:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:* Versions 4.50 – 5.32 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 4.50 – 5.32 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 4.50 – 5.32 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 4.50 – 5.32 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 4.50 – 5.32 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_100_firmware:*:*:*:*:*:*:*:* Versions 4.50 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:vpn1000_firmware:*:*:*:*:*:*:*:* Versions 4.30 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:vpn1000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg20w-vpn_firmware:*:*:*:*:*:*:*:* Versions 4.30 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg20w-vpn:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg20-vpn_firmware:*:*:*:*:*:*:*:* Versions 4.30 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg20-vpn:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:vpn50_firmware:*:*:*:*:*:*:*:* Versions 4.30 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:vpn50:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:vpn300_firmware:*:*:*:*:*:*:*:* Versions 4.30 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:vpn300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:vpn100_firmware:*:*:*:*:*:*:*:* Versions 4.30 – 5.32 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:vpn100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg40_firmware:*:*:*:*:*:*:*:* Versions 4.20 – 4.72 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg40:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg40w_firmware:*:*:*:*:*:*:*:* Versions 4.20 – 4.72 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg40w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg60_firmware:*:*:*:*:*:*:*:* Versions 4.20 – 4.72 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg60:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg60w_firmware:*:*:*:*:*:*:*:* Versions 4.20 – 4.72 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg60w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:zywall_110_firmware:*:*:*:*:*:*:*:* Versions 4.20 – 4.72 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:zywall_110:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:zywall_1100_firmware:*:*:*:*:*:*:*:* Versions 4.20 – 4.72 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:zywall_1100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:zywall_310_firmware:*:*:*:*:*:*:*:* Versions 4.20 – 4.72 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:zywall_310:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2022-38547
- 2026-10-03 Alias added: GHSA-w85w-m9jr-jffx
References
More Zyxel Atp100 Firmware vulnerabilities
- TI-2023-16198 Buffer overflow in Zyxel ATP series firmware KEVCVSS 3.1CRITICAL 9.8
- TI-2023-16197 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
Sources
- CVE-2022-38547 · CVE Program
- CVE-2022-38547 · NVD
- FIRST EPSS
- GHSA-w85w-m9jr-jffx · 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