CVE-2025-9146Linksys E5600 Firmware checkFw.sh verify_gemtek_header risky encryption
- 7.5HighCVSS base score
- 0.59%Exploitation in 30 daysEPSS · top 51% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
Description
A flaw has been found in Linksys E5600 1.1.0.26. The affected element is the function verify_gemtek_header of the file checkFw.sh of the component Firmware Handler. Executing manipulation can lead to risky cryptographic algorithm. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is described as difficult. The vendor was contacted early about this disclosure but did not respond in any way.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits1
References tagged exploit1 reference
Timeline
ID reserved
By VulDB
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulDBCNA (assigner) | 4.0 | High7.5 | CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X |
| VulDBCNA (assigner) | 3.1 | Medium6.6 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R |
| VulDBCNA (assigner) | 3.0 | Medium6.6 | CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R |
| VulDBCNA (assigner) | 2.0 | Medium6.8 | AV:N/AC:H/Au:M/C:C/I:C/A:C/E:ND/RL:ND/RC:UR |
| NVDNVD · Analyzed | 4.0 | High7.5 | CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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 |
- EPSS (exploitation in 30 days)
- 0.59% · top 51% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
References
References5
- VDB-320525 | Linksys E5600 Firmware checkFw.sh verify_gemtek_header risky encryption (opens in a new tab)vdb-entrytechnical-description
- VDB-320525 | CTI Indicators (IOB, IOC, TTP, IOA) (opens in a new tab)signaturepermissions-required
- Submit #628642 | Linksys E5600 1.1.0.26 CWE-327 Use of a Broken or Risky Cryptographic Algorithm (opens in a new tab)third-party-advisory
- https://github.com/IOTRes/IOT_Firmware_Update/blob/main/Linksys/E5600.md (opens in a new tab)patchexploit
- https://www.linksys.com/ (opens in a new tab)product
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-28817 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-9146)Record last updated .