- 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.
- Source
- disclosure@vulncheck.com
- NVD status
- Deferred
CVSS 4.0
- Type
- Secondary
- Base score
- 10
- Impact score
- -
- Exploitability score
- -
- Vector string
- 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:X
- Severity
- CRITICAL
- disclosure@vulncheck.com
- CWE-78
- Hype score
- Not currently trending
Cling is turning STUN into an IoT botnet command-and-control channel. A report says the malware exploits CVE-2021-35394, with additional command-injection flaws targeting exposed routers, DVRs and other devices: CVE-2016-20016, CVE-2023-41011, CVE-2016-10372, CVE-2025-34037, htt
@LandscapeThreat
5 Oct 2026
52 Impressions
1 Retweet
3 Likes
0 Bookmarks
0 Replies
0 Quotes
NØØT Security Alerts Classification: High CVE: CVE-2025-34037 Product: Linksys / E-Series Routers Summary: VulnCheck reports real-world exploitation activity affecting Linksys / E-Series Routers. Evidence: Active exploitation reported; Severe impact class; Live exploitation
@Python_s_
1 Oct 2026
39 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
On the radar: CVE-2025-34037, high exploit probability. An OS command injection vulnerability exists in various models of E-Series Linksys routers via the /tmUnblock.cgi and… EPSS 86% · Risk 26/100. Worth closing before it turns active. https://t.co/fwUaFGIGHl #ThreatIntel
@BytesNora
31 Jul 2026
4 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
Cytellite recent detection targeting CVE-2025-34037 — Conecta Tecnologia LTDA Visit -- https://t.co/Nnmm86SC23 #Loginsoft #Cytellite #Cybersecurity #CVE202534037 #LOVI #ThreatIntelligence #Infosecurity #AI https://t.co/zwxf6LC06v
@Loginsoft_Intel
25 Jul 2026
25 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
Cytellite recent detection targeting CVE-2025-34037 — Conecta Tecnologia LTDA Visit -- https://t.co/Nnmm86SC23 #Loginsoft #Cytellite #Cybersecurity #CVE202534037 #LOVI #ThreatIntelligence #Infosecurity #AI https://t.co/krBBNXTjmL
@Loginsoft_Intel
25 Jul 2026
26 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
35 new OPEN, 66 new PRO (35 + 31) ACR Stealer, Katana Botnet, Lumma Stealer, NetSupport RAT, TA4903, TA569, XWorm, FreePBX (CVE-2026-28287), Linksys (CVE-2025-34037), Microsoft Exchange (CVE-2021-28480, CVE-2021-28481), Nginx-ui (CVE-2026-27944) and more. https://t.co/ohyXs5Drgg
@ET_Labs
17 Mar 2026
432 Impressions
3 Retweets
5 Likes
0 Bookmarks
0 Replies
0 Quotes
RondoDox seems to be abusing CVE-2025-34037, a RCE on the E-Series Linksys routers. https://t.co/qaMxXzAeDB https://t.co/kHCphIQYBT https://t.co/di1NeEBGDd
@r_ynnko
29 Nov 2025
81 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
🚨 Linksys E-Series Alert: CVE-2025-34037 🚨 🐛Critical OS Cmd Injection! Unauth RCE via /tmUnblock.cgi & /hndUnblock.cgi on port 8080. Exploited by “TheMoon” worm. Update FW or block HTTP 8080 🔒 🔗 Read at: https://t.co/ltcTu4VQUi #CVE202534037 #InfoSec
@BaseFortify
24 Jun 2025
34 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
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… https://t.co/j0XGws8XgC
@CVEnew
24 Jun 2025
443 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
CVE-2025-34037 Unauthenticated OS Command Injection in Linksys E-Series Router CGI Scripts https://t.co/PGXwAfdEPJ
@VulmonFeeds
24 Jun 2025
17 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
🚨 CVE-2025-34037: CRITICAL OS command injection in Linksys E4200 routers exploited by "TheMoon" worm! Patch unavailable—segment & monitor now. https://t.co/57n8F5Kiop #OffSeq #Vulnerability #RouterSecurity https://t.co/ncvu8i9gqq
@offseq
24 Jun 2025
38 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes