Quick answers
- Is CVE-2026-113389 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-113389 being exploited in the wild.
- How severe is CVE-2026-113389?
- Critical severity, with a CVSS score of 9.9, published 20 October 2026.
- Which products and versions are affected?
- DrayTek Vigor2960 1.5.1.6 Revision 8218.
- Is there a fix for CVE-2026-113389?
- Yes: fixed in 1.5.1.7. Until then: Restrict administrator access to the web management interface to trusted IPs only; the vendor notes that Vigor2960 is end-of-support with limited backport coverage. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-113389 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-113389?
- 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: 1.5.1.7
Restrict administrator access to the web management interface to trusted IPs only; the vendor notes that Vigor2960 is end-of-support with limited backport coverage.
Technical details
The set_table CGI handler in /cgi-bin/mainfunction.cgi improperly constructs a UCI (OpenWrt configuration) command by directly interpolating the sectiontype field from JSON input into a system() call without shell escaping. An authenticated attacker can inject arbitrary shell metacharacters (e.g., semicolons) via the jsondata parameter to execute commands with CGI process privileges; a fix is available in firmware version 1.5.1.7.
Affected products
- DrayTek Vigor2960 1.5.1.6 Revision 8218
Timeline
- 2026-10-20: disclosed