# CVE-2025-34037

## Summary

- **CVE ID:** CVE-2025-34037
- **Severity:** CRITICAL
- **CVSS Score:** 10 (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)
- **CWE:** CWE-78
- **Published:** Jun 24, 2025
- **Last Modified:** Jul 24, 2026

## 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.

## Affected Products

- Linksys — E2100L v1 (0)
- Linksys — E4200 (0)
- Linksys — E3200 (0)
- Linksys — E3000 (0)
- Linksys — E2500 v1/v2 (0)
- Linksys — E2000 (0)
- Linksys — E1550 (0)
- Linksys — E1500 v1 (0)
- Linksys — E1200 v1 (0)
- Linksys — E1000 v1 (0)
- Linksys — E900 v1 (0)

## References

- [CNA](https://isc.sans.edu/diary/17633)
- [CNA](https://www.exploit-db.com/exploits/31683)
- [CNA](https://vulncheck.com/advisories/linksys-routers-command-injection)
- [CVE](https://github.com/Jarrettgohxz/CVE-research/tree/main/Linksys/E-series/CVE-2025-34037)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 90.88%
- **EPSS Percentile:** 99.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._