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DD-WRT vulnerabilities being exploited

1 DD-WRT flaw was confirmed exploited in the wild in the past 365 days, across 1 product: DD-WRT. If you run any of them, patch these first.

AddedExploited vulnerabilityFix by
2026-07-21CVE-2021-27137 DD-WRT
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.

2026-07-24
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Source: CISA Known Exploited Vulnerabilities catalog 2026.10.29 (live). A listing means some versions are affected: check yours in the advisory. Guidance only.