Quick answers
- Is CVE-2026-113397 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-113397 being exploited in the wild.
- How severe is CVE-2026-113397?
- High severity, with a CVSS score of 7.4, published 20 October 2026.
- Which products and versions are affected?
- DrayTek Vigor2960 1.5.1.6 Revision 8218 and earlier.
- Is there a fix for CVE-2026-113397?
- Yes: fixed in Vigor2960 1.5.1.7. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-113397 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-113397?
- Check whether you run DrayTek Vigor2960 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: Vigor2960 1.5.1.7
Technical details
The ruequest_certificate function in /cgi-bin/mainfunction.cgi (IPsec Handler) fails to properly escape the user-controlled "option" parameter before passing it to a shell command via snprintf and system(). An authenticated attacker can break out of the single-quoted context with a payload like foo';<command>;# to execute arbitrary shell commands with mainfunction.cgi privileges. A public proof-of-concept demonstrates achieving an interactive reverse shell on the device.
Affected products
- DrayTek Vigor2960 1.5.1.6 Revision 8218 and earlier
Timeline
- 2026-10-20: disclosed
- 2026-10-20: advisory