RCE in Linksys E1000 V1
CVE-2025-34037
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
EPSS exploit prediction
EPSS: 0.928 (99.8th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.909 · newest: 0.928 · change: +0.018
Affected products
- Linksys E1000 V1 — versions 0
- Linksys E1200 V1 — versions 0
- Linksys E1500 V1 — versions 0
- Linksys E1550 — versions 0
- Linksys E2000 — versions 0
- Linksys E2100l V1 — versions 0
- Linksys E2500 V1/v2 — versions 0
- Linksys E3000 — versions 0
- Linksys E3200 — versions 0
- Linksys E4200 — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- isc.sans.edu/diary/17633 (technical-description)
- www.exploit-db.com/exploits/31683 (exploit, third-party-advisory)
- vulncheck.com/advisories/linksys-routers-command-injection (third-party-advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-34037?
- CVE-2025-34037 is a vulnerability in Linksys E1000 V1, classified under OS Command Injection. Published 2025-06-24.
- Is CVE-2025-34037 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.