CVE-2020-10825

9.8 criticalEPSS 4.1%

Critical (9.8) in draytek. EPSS 4.1% chance of exploitation in the next 30 days.

A stack-based buffer overflow in /cgi-bin/activate.cgi while base64 decoding ticket parameter on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve code execution via a remote HTTP request (issue 3 of 3).

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 4.1% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2020-03-26
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

draytek:vigor2960_firmware
draytek:vigor300b_firmware
draytek:vigor3900_firmware

References

https://slashd.ga/2020/03/draytek-vulnerabilities/
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability/
https://slashd.ga/2020/03/draytek-vulnerabilities/
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability/

Check your stack JSON