CVE-2020-14993
9.8
CRITICAL · CVSS 3.1 · EPSS 5.5% (pctl 93)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1.1 allows remote attackers to execute arbitrary code via the formuserphonenumber parameter in an authusersms action to mainfunction.cgi.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 5.54% — more likely to be exploited than 93% of all CVEs |
| Weakness | CWE-787 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2020-06-23 |
| Last modified | 2026-06-17 |
Affected (6)
| Vendor | Product |
|---|---|
| draytek | vigor2960 |
| draytek | vigor2960 firmware |
| draytek | vigor300b |
| draytek | vigor300b firmware |
| draytek | vigor3900 |
| draytek | vigor3900 firmware |
References
- https://github.com/dexterone/Vigor-poc
- https://www.draytek.com/about/security-advisory
- https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-%28cve-2020-14473%29
- https://github.com/dexterone/Vigor-poc
- https://www.draytek.com/about/security-advisory
- https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-%28cve-2020-14473%29
→ the Explorer · watch your stack · NVD