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.
Metrics
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linksys | E4200 | < 1.0.06 |
| Linksys | E3200 | < 1.0.05 |
| Linksys | E3000 | < 1.0.06 |
| Linksys | E2500 v1/v2 | < 2.0.00 |
| Linksys | E2100L v1 | <= 1.0.05 |
| Linksys | E2000 | 0 |
| Linksys | E1550 | <= 1.0.03 |
| Linksys | E1500 v1 | < 1.0.06 |
| Linksys | E1200 v1 | <= 1.0.04 |
| Linksys | E1000 v1 | < 2.1.03 |
| Linksys | E900 v1 | < 1.0.04 |
References
Timeline
- Published
- Jun 24, 2025
- Last modified
- Jul 22, 2026
- NVD status
- Deferred