--- title: "CVE-2025-34037: Linksys Routers E/WAG/WAP/WES/WET/WRT-Seri… | CubePath" 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…" language: en source: https://cubepath.com/security/cve/CVE-2025-34037 --- # CVE-2025-34037: Linksys Routers E/WAG/WAP/WES/WET/WRT-Seri… | CubePath ## 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. Official description from the CVE record, published by VulnCheck. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-34037) ## Key data ### CVSS 4.0 Critical 10.0 Score published by VulnCheck in the CVE record. 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 | Metric | Value | What it means | | ----------------------------------- | ------- | --------------------------------------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No measurable action is needed to get around the system's built-in security controls. The attack is repeatable. | | Attack requirements | None | The attack works without any special deployment or execution conditions. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Vulnerable system: confidentiality | High | Serious or total effect on the secrecy of data. | | Vulnerable system: integrity | High | Serious or total effect on the trustworthiness of data. | | Vulnerable system: availability | High | Serious or total effect on availability. | | Subsequent systems: confidentiality | High | Serious or total effect on other systems' data secrecy. | | Subsequent systems: integrity | High | Serious or total effect on other systems' data trustworthiness. | | Subsequent systems: availability | High | Serious or total effect on other systems' availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.96154 (96.2% probability) Percentile 99.9% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA assessment as of Jun 24, 2025 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Public proof of concept recorded by CISA Automatable yes Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-78](https://cwe.mitre.org/data/definitions/78.html) Improper Neutralization of Special Elements used in an OS Command ## Affected products Products listed in the CVE record, as the CNA published them. - Linksys E4200 - affected: before 1.0.06 - Linksys E3200 - affected: before 1.0.05 - Linksys E3000 - affected: before 1.0.06 - Linksys E2500 v1/v2 - affected: before 2.0.00 - Linksys E2100L v1 - affected: up to 1.0.05 - Linksys E2000 - affected: 0 - Linksys E1550 - affected: up to 1.0.03 - Linksys E1500 v1 - affected: before 1.0.06 - Linksys E1200 v1 - affected: up to 1.0.04 - Linksys E1000 v1 - affected: before 2.1.03 - Linksys E900 v1 - affected: before 1.0.04 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [isc.sans.edu/diary/17633](https://isc.sans.edu/diary/17633) technical-description - [exploit-db.com/exploits/31683](https://www.exploit-db.com/exploits/31683) third-party-advisory exploit - [vulncheck.com/advisories/linksys-routers-command-injection](https://vulncheck.com/advisories/linksys-routers-command-injection) third-party-advisory - [github.com/Jarrettgohxz/CVE-research/tree/main/Linksys/E-se…](https://github.com/Jarrettgohxz/CVE-research/tree/main/Linksys/E-series/CVE-2025-34037) ## Timeline 1. ID reserved Apr 15, 2025 2. Record published Jun 24, 2025 3. Record last updated Jul 22, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:03 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)