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CVE

CVE-2021-27137

P2
DD-WRT Stack-Based Buffer Overflow Vulnerability
DD-WRT · DD-WRT
Date added (CISA)
2026-07-21
Remediation due
2026-07-24
Known ransomware use
Not indicated
Remediation priority
P2 — past CISA due date
Associated with
Related to
  • Lazarus Group (TraderTraitor cluster) / APT38 / BlueNoroff · SPECTREcampaignCorrelated cluster2026-09-16
  • DysphoriacampaignCorrelated cluster2026-08-24

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.

Source: NVD ↗ · CISA KEV Catalog ↗