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CVE-2025-34037

Linksys Routers E/WAG/WAP/WES/WET/WRT-Series

Published: Jun 24, 2025Updated: Nov 20, 2025 Sources: CVE List NVD BDUCWE-78
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
85.4%
Top 0.3%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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 is exploited in the wild by the "TheMoon" worm to deploy a MIPS ELF payload, enabling arbitrary code execution on the router. 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.

CVSS Vector Breakdown

AV:NAC:LC:HI:HA:H
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Impact
C:HConfidentiality
H
I:HIntegrity
H
A:HAvailability
H
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Weaknesses

CWE-78

Affected Products

E4200LinksysNetworking Infrastructure
E3200LinksysNetworking Infrastructure
E3000LinksysNetworking Infrastructure
E2500 v1/v2LinksysNetworking Infrastructure
E2100L v1LinksysNetworking Infrastructure
linksyscommercialUSNetworking Infrastructureaka linksys by cisco
and 17 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Execution
View detailed technique mapping

References

https://isc.sans.edu/diary/17633
isc.sans.edu
https://vulncheck.com/advisories/linksys-routers-command-injection
vulncheck.com
https://www.exploit-db.com/exploits/31683
exploit-db.com
and 1 more references View all →

Timeline

Published
Jun 24, 2025
Last Updated
Nov 20, 2025

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