DrayTek Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3_Beta…
Priority CRITICAL 100Exploited in the wildCWE-78Published · 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 · CISA ADP. Fix status from CNA. Impact type from CWE-78.
Summary
DrayTek Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3_Beta, 1.4.2.1_Beta, and 1.4.4_Beta devices allow remote code execution as root (without authentication) via shell metacharacters to the cgi-bin/mainfunction.cgi URI. This issue has been fixed in Vigor3900/2960/300B v1.5.1.
Why it matters now
Exploitation Active In CISA KEV since 2021-11-03CISA due date 2022-05-03
EPSS 0.99993 99th 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
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:draytek:vigor2960_firmware:1.3.1:beta:*:*:*:*:*:* | 1.3.1 beta | Vulnerable | DrayTek |
| cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:* | not specified by NVD | Running on | DrayTek |
| cpe:2.3:o:draytek:vigor300b_firmware:1.3.3:beta:*:*:*:*:*:* | 1.3.3 beta | Vulnerable | DrayTek |
| cpe:2.3:o:draytek:vigor300b_firmware:1.4.2.1:beta:*:*:*:*:*:* | 1.4.2.1 beta | Vulnerable | DrayTek |
| cpe:2.3:o:draytek:vigor300b_firmware:1.4.4:beta:*:*:*:*:*:* | 1.4.4 beta | Vulnerable | DrayTek |
| cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:* | not specified by NVD | Running on | DrayTek |
| cpe:2.3:o:draytek:vigor3900_firmware:1.4.4:beta:*:*:*:*:*:* | 1.4.4 beta | Vulnerable | DrayTek |
| cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:* | not specified by NVD | Running on | DrayTek |
- cpe:2.3:o:draytek:vigor2960_firmware:1.3.1:beta:*:*:*:*:*:* Versions 1.3.1 beta Vulnerable ·DrayTek
- cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·DrayTek
- cpe:2.3:o:draytek:vigor300b_firmware:1.3.3:beta:*:*:*:*:*:* Versions 1.3.3 beta Vulnerable ·DrayTek
- cpe:2.3:o:draytek:vigor300b_firmware:1.4.2.1:beta:*:*:*:*:*:* Versions 1.4.2.1 beta Vulnerable ·DrayTek
- cpe:2.3:o:draytek:vigor300b_firmware:1.4.4:beta:*:*:*:*:*:* Versions 1.4.4 beta Vulnerable ·DrayTek
- cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·DrayTek
- cpe:2.3:o:draytek:vigor3900_firmware:1.4.4:beta:*:*:*:*:*:* Versions 1.4.4 beta Vulnerable ·DrayTek
- cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·DrayTek
Remediation
No fixed version listed by the sources yet.
Timeline
- 2021-11-03 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2020-8515
- 2026-10-03 Alias added: GHSA-4866-p686-25f3
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-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
- TI-2020-08712 A stack-based buffer overflow in /cgi-bin/activate.cgi while base64 decoding ticket… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2020-8515 · CVE Program
- CVE-2020-8515 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-4866-p686-25f3 · 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