CVE-2025-34037 (GCVE-0-2025-34037)
Vulnerability from cvelistv5 – Published: 2025-06-24 01:03 – Updated: 2026-07-22 14:59 X_Known Exploited VulnerabilityTitle
Linksys Routers E/WAG/WAP/WES/WET/WRT-Series
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-06-24 15:53 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://isc.sans.edu/diary/17633 | technical-description |
| https://www.exploit-db.com/exploits/31683 | third-party-advisoryexploit |
| https://vulncheck.com/advisories/linksys-routers-… | third-party-advisory |
| https://github.com/Jarrettgohxz/CVE-research/tree… |
Impacted products
11 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linksys | E4200 |
Affected:
0 , < 1.0.06
(custom)
|
guessed | |
| Linksys | E3200 |
Affected:
0 , < 1.0.05
(custom)
|
guessed | |
| Linksys | E3000 |
Affected:
0 , < 1.0.06
(custom)
|
guessed | |
| Linksys | E2500 v1/v2 |
Affected:
0 , < 2.0.00
(custom)
|
guessed | |
| Linksys | E2100L v1 |
Affected:
0 , ≤ 1.0.05
(custom)
|
guessed | |
| Linksys | E2000 |
Affected:
0
(semver)
|
guessed | |
| Linksys | E1550 |
Affected:
0 , ≤ 1.0.03
(custom)
|
guessed | |
| Linksys | E1500 v1 |
Affected:
0 , < 1.0.06
(custom)
|
guessed | |
| Linksys | E1200 v1 |
Affected:
0 , ≤ 1.0.04
(custom)
|
guessed | |
| Linksys | E1000 v1 |
Affected:
0 , < 2.1.03
(custom)
|
guessed | |
| Linksys | E900 v1 |
Affected:
0 , < 1.0.04
(custom)
|
guessed |
Date Public
2014-02-16 00:00
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 6d0d707b-b9a4-41e4-bf52-7517a85432cd
Exploited: Yes
Timestamps
First Seen: 2026-01-09
Asserted: 2026-01-09
Last Seen: 2026-07-20
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Linksys / Linksys E-Series | Class: router | IoT: yes | In CISA KEV: no | Honeypot connections on 2026-07-20: 126
Evidence
Type: Honeypot
Signal: In The Wild Attempts
Confidence: 70%
Source: shadowserver
Details
| 1D | 16 |
|---|---|
| Iot | yes |
| Feed | Shadowserver Foundation honeypot/exploited-vulnerabilities |
| Type | http-scan |
| Class | router |
| 7D Avg | 16 |
| Vendor | Linksys |
| 30D Avg | 18 |
| 90D Avg | 8 |
| Product | Linksys E-Series |
| Cisa Kev | no |
| Connections | 126 |
| Observation Date | 2026-07-20 |
| Vulnerability Class | None |
| Vulnerability Score | None |
| Vulnerability Severity | None |
References
Created: 2026-06-30 09:22 UTC
| Updated: 2026-07-22 01:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 145f69f4-a513-48a5-ac24-678b469ffd54
Exploited: Yes
Timestamps
First Seen: 2026-05-28
Asserted: 2026-05-28
Scope
Notes: KEVIntel entry: Linksys Routers E/WAG/WAP/WES/WET/WRT-Series | Affected: Linksys / E4200, E3200, E3000, E2500 v1/v2, E2100L v1, E2000, E1550, E1500 v1, E1200 v1, E1000 v1, E900 v1 | CVSS: 10.0 (CRITICAL) | EPSS: 0.85373 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | Linksys Routers E/WAG/WAP/WES/WET/WRT-Series |
| Vendor | Linksys |
| Product | E4200, E3200, E3000, E2500 v1/v2, E2100L v1, E2000, E1550, E1500 v1, E1200 v1, E1000 v1, E900 v1 |
| Added Date | 2026-05-28T00:00:00.000Z |
| Cvss Score | 10.0 |
| Epss Score | 0.85373 |
| Cvss Severity | CRITICAL |
| Epss Percentile | 0.9969 |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | True |
References
Created: 2026-06-23 14:03 UTC
| Updated: 2026-07-10 06:14 UTC
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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