A Remote Command Injection vulnerability exists in DrayTek Vigor 2960 1.5.1.3, DrayTek…
Priority HIGH 68CWE-77Published · 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 · NVD. Fix status from CNA. Impact type from CWE-77.
Summary
A Remote Command Injection vulnerability exists in DrayTek Vigor 2960 1.5.1.3, DrayTek Vigor 3900 1.5.1.3, and DrayTek Vigor 300B 1.5.1.3 via a crafted HTTP message containing malformed QUERY STRING in mainfunction.cgi, which could let a remote malicious user execute arbitrary code.
Why it matters now
EPSS 0.34845 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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 · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:draytek:vigor2960_firmware:1.5.1.3:*:*:*:*:*:*:* | 1.5.1.3 | Vulnerable | DrayTek |
| cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:* | not specified by NVD | Running on | DrayTek |
| cpe:2.3:o:draytek:vigor3900_firmware:1.5.1.3:*:*:*:*:*:*:* | 1.5.1.3 | Vulnerable | DrayTek |
| cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:* | not specified by NVD | Running on | DrayTek |
| cpe:2.3:o:draytek:vigor300b_firmware:1.5.1.3:*:*:*:*:*:*:* | 1.5.1.3 | Vulnerable | DrayTek |
| cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:* | not specified by NVD | Running on | DrayTek |
- cpe:2.3:o:draytek:vigor2960_firmware:1.5.1.3:*:*:*:*:*:*:* Versions 1.5.1.3 Vulnerable ·DrayTek
- cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·DrayTek
- cpe:2.3:o:draytek:vigor3900_firmware:1.5.1.3:*:*:*:*:*:*:* Versions 1.5.1.3 Vulnerable ·DrayTek
- cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·DrayTek
- cpe:2.3:o:draytek:vigor300b_firmware:1.5.1.3:*:*:*:*:*:*:* Versions 1.5.1.3 Vulnerable ·DrayTek
- cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·DrayTek
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-43118
- 2026-10-03 Alias added: GHSA-3q87-6fcw-7mj7
References
More DrayTek Vigor2960 Firmware vulnerabilities
- TI-2020-12150 On DrayTek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1… KEVCVSS 3.1CRITICAL 9.8
- TI-2020-06834 DrayTek Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3_Beta… KEVCVSS 3.1CRITICAL 9.8
- TI-2024-12038 DrayTek Vigor2960/Vigor300B Web Management Interface apmcfgupload os command injection KEVCVSS 4.0MEDIUM 6.9
- TI-2020-08715 A stack-based buffer overflow in cvmd on Draytek Vigor3900, Vigor2960, and Vigor300B… CVSS 3.1CRITICAL 9.8
- TI-2020-08714 A stack-based buffer overflow in apmd on Draytek Vigor3900, Vigor2960, and Vigor300B… CVSS 3.1CRITICAL 9.8
- TI-2020-08713 /cgi-bin/activate.cgi on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-43118 · CVE Program
- CVE-2021-43118 · NVD
- FIRST EPSS
- GHSA-3q87-6fcw-7mj7 · 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