CVE-2025-34037

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under NVD CVSS v3. EPSS exploit probability: 86.1%, top 0% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Weaponized
10.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 86%
  • Public exploit code is available (Metasploit, ssvc poc, epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 86%CVSS: 10.0Exploit: Metasploit · ssvc poc · epss top5pct · epss high · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
94(Attend)
EG Risk 94/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity100% × 45%
Exploitation86% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
86%
EPSS %ILE
100%
KEV
Not listed

Published

June 24, 2025

Last Modified

July 22, 2026

Advisory Details (4)

Auto-updated Jul 22, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🟡 PoC Available

CVE-research/Linksys/E-series/CVE-2025-34037 at main · Jarrettgohxz/CVE-research · GitHub

https://github.com/Jarrettgohxz/CVE-research/tree/main/Linksys/E-series/CVE-2025-34037
generic🟡 PoC Available

Linksys E-series - Remote Code Execution - Hardware remote Exploit

https://www.exploit-db.com/exploits/31683
generic🔴 Active Exploitation

Linksys Multiple Routers OS Command Injection | Advisories | VulnCheck

https://vulncheck.com/advisories/linksys-routers-command-injection
generic🔴 Active Exploitation

Linksys Worm "TheMoon" Summary: What we know so far

https://isc.sans.edu/diary/17633

Vendor Advisories for CVE-2025-34037(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 18× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-26 14:54 UTCEPSS rescore
  2. 2026-07-24 14:17 UTCEPSS rescore
  3. 2026-07-23 02:54 UTCEG score recompute▲ 1.00
  4. 2026-07-22 14:07 UTCEPSS rescore
  5. 2026-07-22 14:07 UTCEPSS rescore
  6. 2026-07-20 17:07 UTCEPSS rescore
  7. 2026-07-19 14:30 UTCEPSS rescore
  8. 2026-07-19 14:30 UTCEPSS rescore
  9. 2026-07-15 16:57 UTCEPSS rescore
  10. 2026-07-15 16:57 UTCEPSS rescore
  11. 2026-07-15 01:59 UTCEPSS rescore
  12. 2026-07-15 01:59 UTCEPSS rescore
  13. 2026-07-13 06:12 UTCEPSS rescore
  14. 2026-07-09 19:09 UTCEPSS rescore
  15. 2026-07-09 19:09 UTCEPSS rescore
  16. 2026-07-04 06:30 UTCEPSS rescore
  17. 2026-07-01 15:06 UTCEPSS rescore
  18. 2026-07-01 15:06 UTCEPSS rescore
  19. 2026-06-27 03:08 UTCEPSS rescore
  20. 2026-06-27 03:08 UTCEPSS rescore
  21. 2026-06-23 21:32 UTCEPSS rescore
  22. 2026-06-23 21:32 UTCEPSS rescore
  23. 2026-06-19 19:25 UTCEPSS rescore
  24. 2026-06-19 19:25 UTCEPSS rescore
  25. 2026-06-15 17:48 UTCEPSS rescore
Show 33 more
  1. 2026-06-14 23:17 UTCEPSS rescore
  2. 2026-06-13 23:00 UTCEPSS rescore
  3. 2026-06-13 23:00 UTCEPSS rescore
  4. 2026-06-10 22:18 UTCEPSS rescore
  5. 2026-06-10 13:22 UTCEPSS rescore
  6. 2026-06-05 22:46 UTCEPSS rescore
  7. 2026-06-05 22:46 UTCEPSS rescore
  8. 2026-06-05 06:10 UTCEPSS rescore
  9. 2026-06-05 06:10 UTCEPSS rescore
  10. 2026-06-04 13:12 UTCEPSS rescore
  11. 2026-06-04 13:11 UTCEPSS rescore
  12. 2026-06-01 13:51 UTCEPSS rescore
  13. 2026-06-01 13:51 UTCEPSS rescore
  14. 2026-05-28 13:44 UTCEPSS rescore
  15. 2026-05-28 13:44 UTCEPSS rescore
  16. 2026-05-28 13:44 UTCEPSS rescore
  17. 2026-05-28 13:44 UTCEPSS rescore
  18. 2026-05-26 07:18 UTCEPSS rescore
  19. 2026-05-26 07:18 UTCEPSS rescore
  20. 2026-05-26 07:18 UTCEPSS rescore
  21. 2026-05-26 07:18 UTCEPSS rescore
  22. 2026-05-23 15:20 UTCEPSS rescore
  23. 2026-05-22 21:16 UTCEPSS rescore
  24. 2026-05-22 21:16 UTCEPSS rescore
  25. 2026-05-21 12:13 UTCEG score recompute
  26. 2026-05-21 12:13 UTCGHSA enrichment
  27. 2026-05-20 22:37 UTCEPSS rescore
  28. 2026-05-20 22:37 UTCEPSS rescore
  29. 2026-05-20 22:37 UTCEPSS rescore
  30. 2026-05-20 22:37 UTCEPSS rescore
  31. 2026-05-20 22:37 UTCEPSS rescore
  32. 2026-05-20 22:37 UTCEPSS rescore
  33. 2026-05-18 21:31 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitexploit/linux/http/linksys_themoon_exec✓ verified
    First seen Feb 13, 2014

    Linksys E-Series TheMoon Remote Command Injection

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-34037?
CVE-2025-34037 is a critical vulnerability published on June 24, 2025. 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…
When was CVE-2025-34037 disclosed?
CVE-2025-34037 was first published in the National Vulnerability Database on June 24, 2025, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-34037 actively exploited?
CVE-2025-34037 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 86% probability of exploitation in the next 30 days, which ranks it in the top 0.3% of all scored CVEs.
What is the CVSS score of CVE-2025-34037?
CVE-2025-34037 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2025-34037?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-34037, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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