DD-WRT: security record
CISA's Known Exploited Vulnerabilities catalog lists 1 flaw in DD-WRT routers and network gear that attackers have exploited in the wild, added on 21 July 2026.
What this list means
CISA adds a flaw to its Known Exploited Vulnerabilities catalog when there is reliable evidence that attackers have used it in the wild and clear steps exist to fix or reduce it. A listed flaw usually has a patch or workaround from the maker. Some older devices are no longer supported and will not be fixed. If you own an affected model, check the maker's notice, update the firmware or replace the device if it is out of support.
DD-WRT Stack-Based Buffer Overflow Vulnerability
DD-WRT contains a stack-based buffer overflow vulnerability that could allow an unauthenticated attacker to overflow an internal buffer used by UPnP and trigger a code execution vulnerability.
A listing shows that a flaw was exploited, not how a maker compares overall. Makers with many devices in use tend to appear more often. Check the maker's own notice for the models and firmware versions affected.
Sources
- Cybersecurity and Infrastructure Security Agency (CISA), Known Exploited Vulnerabilities Catalog, version 2026.10.28, released 28 October 2026
- National Institute of Standards and Technology, National Vulnerability Database
Checked 29 October 2026.