Linksys E5600 1.1.0.26 Firmware checkFw.sh verify_gemtek_header risky encryption
Summary
A vulnerability identified as problematic has been detected in Linksys E5600 1.1.0.26. The impacted element is the function verify_gemtek_header of the file checkFw.sh of the component Firmware Handler. The manipulation leads to risky encryption.
This vulnerability is referenced as CVE-2025-9146. Remote exploitation of the attack is possible. No exploit is available.
The vendor was contacted early about this disclosure but did not respond in any way.
Details
A vulnerability was found in Linksys E5600 1.1.0.26. It has been rated as critical. This issue affects the function verify_gemtek_header of the file checkFw.sh of the component Firmware Handler. The manipulation with an unknown input leads to a risky encryption vulnerability. Using CWE to declare the problem leads to CWE-327. The product uses a broken or risky cryptographic algorithm or protocol. Impacted is confidentiality, integrity, and availability.
The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-9146. The exploitation is known to be difficult. The attack may be initiated remotely. The exploitation requires an enhanced level of successful authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1600 for this issue.
The vendor was contacted early about this disclosure but did not respond in any way.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Product
Type
Vendor
Name
Version
License
Website
- Vendor: https://www.linksys.com/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒
CVSSv3
VulDB Meta Base Score: 7.1VulDB Meta Temp Score: 7.0
VulDB Base Score: 6.6
VulDB Temp Score: 6.4
VulDB Vector: 🔒
VulDB Reliability: 🔍
NVD Base Score: 8.1
NVD Vector: 🔒
CNA Base Score: 6.6
CNA Vector: 🔒
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Risky encryptionCWE: CWE-327 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒
Physical: No
Local: No
Remote: Yes
Availability: 🔒
Status: Not defined
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔒
Timeline
08/19/2025 Advisory disclosed08/19/2025 VulDB entry created
09/12/2025 VulDB entry last update
Sources
Vendor: linksys.comAdvisory: github.com
Status: Not defined
CVE: CVE-2025-9146 (🔒)
GCVE (CVE): GCVE-0-2025-9146
GCVE (VulDB): GCVE-100-320525
Entry
Created: 08/19/2025 09:30Updated: 09/12/2025 16:53
Changes: 08/19/2025 09:30 (55), 08/20/2025 04:37 (30), 09/12/2025 16:53 (12)
Complete: 🔍
Submitter: IOT_Res
Cache ID: 216::103
Submit
Accepted
- Submit #628642: Linksys E5600 1.1.0.26 CWE-327 Use of a Broken or Risky Cryptographic Algorithm (by IOT_Res)
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
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