CVE-2025-9146 json
Linksys E5600 Firmware checkFw.sh verify_gemtek_header risky encryption
published 2025-08-19 14 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-28817
- cvss
- 6.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 46%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 14 mo ago
Exploit prediction
0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/IOTRes/IOT_Firmware_Update/blob/main/Linksys/E5600.md referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.5 | 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 |
| CNA | 3.1 | 6.6 | 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 |
| CNA | 3.0 | 6.6 | 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 |
| CNA | 2.0 | 6.8 | AV:N/AC:H/Au:M/C:C/I:C/A:C/E:ND/RL:ND/RC:UR |
| CNA | 4.0 | 7.5 | 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 |
| CNA | 3.1 | 6.6 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 2.0 | 6.8 | AV:N/AC:H/Au:M/C:C/I:C/A:C |
Affected products
- Linksys E5600
Classification
References
-
github.com
/IOTRes/IOT_Firmware_Update/blob/main/Linksys/E5600.md
patch, exploit, third-party-advisory
-
vuldb.com
/?id.320525
vdb-entry, technical-description, third-party-advisory
-
vuldb.com
/?ctiid.320525
signature, permissions-required, vdb-entry
-
vuldb.com
/?submit.628642
third-party-advisory, vdb-entry
-
linksys.com
/
product
Sources
- CVE List CVE-2025-9146
- NVD CVE-2025-9146
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