Security
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CVE-2021-27137

HIGHCVSS 8.1Known Exploited
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.

Timeline
Published:July 16th, 2026 6:16 PM
Last modified:July 22nd, 2026 5:17 AM
Added to KEV:July 21st, 2026
CVSS Scoring

CVSS v3: 8.1 (HIGH)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Software
From NVD CPE configuration data

Vendors

dd-wrt

Products

dd-wrt
Weaknesses (CWE)

Source: NIST NVD · Data may lag official sources by up to one minute