CVE-2025-9146 Details
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.
A vulnerability exists in the Linksys E5600 router running firmware version 1.1.0.26. The issue arises in the function verify_gemtek_header within the checkFw.sh file, part of the Firmware Handler component. The vulnerability is due to improper integrity verification using CRC (cyclic redundancy check), which can be easily bypassed. Attackers could craft malicious firmware that matches the CRC value of legitimate updates, allowing the harmful firmware to be installed on the device. This could lead to arbitrary code execution or a denial-of-service condition.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 19, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/IOTRes/IOT_Firmware_Update/blob/main/Linksys/E5600.md | CISA-ADP | ExploitThird Party Advisory |
| https://github.com/IOTRes/IOT_Firmware_Update/blob/main/Linksys/E5600.md | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/?ctiid.320525 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.320525 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.628642 | [email protected] | Third Party AdvisoryVDB Entry |
| https://www.linksys.com/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-327 | Use of a Broken or Risky Cryptographic Algorithm | [email protected] |
| CWE-310 | Cryptographic Issues | [email protected] |
| CWE-327 | Use of a Broken or Risky Cryptographic Algorithm | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linksys e5600 firmware | 1.1.0.26 |
CPE
Remediation
| |
| linksys e5600 | All versions |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Sep 12, 2025 | Initial Analysis | [email protected] |
| Aug 19, 2025 | CVE Modified | CISA-ADP |
| Aug 19, 2025 | New CVE Received | [email protected] |