Certain Zyxel products allow command injection by an admin via an input string to…
Priority LOW 36CWE-77Published · 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 · NVD. Fix status from CNA. Impact type from CWE-77.
Summary
Certain Zyxel products allow command injection by an admin via an input string to chg_exp_pwd during a password-change action. This affects VPN On-premise before ZLD V4.39 week38, VPN Orchestrator before SD-OS V10.03 week32, USG before ZLD V4.39 week38, USG FLEX before ZLD V4.55 week38, ATP before ZLD V4.55 week38, and NSG before 1.33 patch 4.
Why it matters now
EPSS 0.02372 83rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:zyxel:vpn_orchestrator:*:*:*:*:*:*:*:* | before 10.03 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:* | before 4.39; before 4.55 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:usg_flex:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:h:zyxel:atp:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:nsg_firmware:*:*:*:*:*:*:*:* | before 1.33 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:nsg_firmware:1.33:-:*:*:*:*:*:* | 1.33 | Vulnerable | Zyxel |
| cpe:2.3:o:zyxel:nsg_firmware:1.33:patch1:*:*:*:*:*:* | 1.33 patch1 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:nsg:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:usg_flex_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Zyxel |
- cpe:2.3:o:zyxel:vpn_orchestrator:*:*:*:*:*:*:*:* Versions before 10.03 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:* Versions before 4.39; before 4.55 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:usg_flex:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:h:zyxel:atp:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:nsg_firmware:*:*:*:*:*:*:*:* Versions before 1.33 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:nsg_firmware:1.33:-:*:*:*:*:*:* Versions 1.33 Vulnerable ·Zyxel
- cpe:2.3:o:zyxel:nsg_firmware:1.33:patch1:*:*:*:*:*:* Versions 1.33 patch1 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:nsg:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:usg_flex_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Zyxel
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-29299
- 2026-10-03 Alias added: GHSA-g8hw-8grv-27jh
References
Sources
- CVE-2020-29299 · CVE Program
- CVE-2020-29299 · NVD
- FIRST EPSS
- GHSA-g8hw-8grv-27jh · 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