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Vulnerability · Published Jun 24, 2025 · Assigned by VulnCheck

CVE-2025-34037Linksys Routers E/WAG/WAP/WES/WET/WRT-Series

Critical 10.0

In plain English

A critical-severity OS command injection in E1000 v1 from Linksys. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 96.2% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, public proof-of-concept code.

Severity (CVSS 4.0)10.0Critical
Exploit odds (30 days)96.2%top 0.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling2Metasploit, Public PoC

Official description

An OS command injection vulnerability exists in various models of E-Series Linksys routers via the /tmUnblock.cgi and /hndUnblock.cgi endpoints over HTTP on port 8080. The CGI scripts improperly process user-supplied input passed to the ttcp_ip parameter without sanitization, allowing unauthenticated attackers to inject shell commands. This vulnerability was reported to be exploited in the wild by the "TheMoon" worm  in 2014 to deploy a MIPS ELF payload, enabling arbitrary code execution on the router. Additionally, this vulnerability may affect other Linksys products to include, but not limited to, WAG/WAP/WES/WET/WRT-series router models and Wireless-N access points and routers. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-06 UTC.

Affected products (as reported)

VendorProductVersions
Linksys E4200 0 – before 1.0.06
Linksys E3200 0 – before 1.0.05
Linksys E3000 0 – before 1.0.06
Linksys E2500 v1/v2 0 – before 2.0.00
Linksys E2100L v1 0 – through 1.0.05
Linksys E2000 0
Linksys E1550 0 – through 1.0.03
Linksys E1500 v1 0 – before 1.0.06
Linksys E1200 v1 0 – through 1.0.04
Linksys E1000 v1 0 – before 2.1.03
Linksys E900 v1 0 – before 1.0.04

Weakness: CWE-78 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References