{"cvss":8.1,"datePublished":"2026-06-03T00:00:00Z","dateUpdated":"2026-06-03T00:00:00Z","description":"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.","dueDate":"2026-07-24T00:00:00Z","id":"CVE-2021-27137","kev_catalogs":["vulncheck"],"knownRansomwareCampaignUse":"Unknown","product":"DD-WRT","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","severity":"HIGH","source":"vulncheck_kev","title":"DD-WRT Stack-Based Buffer Overflow Vulnerability","vendor":"DD-WRT"}