{"id":"CVE-2021-27137","vendor_project":"DD-WRT","product":"DD-WRT","vulnerability_name":"DD-WRT Stack-Based Buffer Overflow Vulnerability","date_added":"2026-07-21","due_date":"2026-07-24","known_ransomware_use":"Unknown","short_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.","required_action":"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.","cwes":"CWE-121","cvss_version":"3.1","cvss_severity":"HIGH","cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","nvd_published":"2026-07-16","nvd_status":"Analyzed","epss":0.03995,"epss_percentile":0.90078,"cvss_score":8.1,"days_published_to_kev":5,"source":"https://data.cybermax-tools.workers.dev/cve/CVE-2021-27137","by":"CyberMax"}