CVE-2026-121615
Linksys E5600 Login mesh_login.cgi improper authentication
A vulnerability was determined in Linksys E5600 1.1.0.26. Affected is an unknown function of the file /cgi-bin/mesh_login.cgi of the component Login Handler. Executing a manipulation can lead to improper authentication. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way. This vulnerability only affects products that are no longer supported by the maintainer.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| E5600 Linksys |
1.1.0.26 (affected) | CNA: VulDB |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 10.0 critical |
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:P | CNA: VulDB |
| 3.1 / 10.0 critical |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C | CNA: VulDB |
| 3.0 / 10.0 critical |
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C | CNA: VulDB |
| 2.0 / 10.0 critical |
AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:C | CNA: VulDB |
| 4.0 / 9.3 critical |
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:P/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 | NVD: [email protected] |
| 3.1 / 10.0 critical |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | NVD: [email protected] |
| 2.0 / 10.0 high |
AV:N/AC:L/Au:N/C:C/I:C/A:C | NVD: [email protected] |
Exploit evidence
- https://github.com/Zimo-666/E5600-cves/tree/main/02-mesh-login-auth-bypass
exploit · CNA: VulDB
References
- https://vuldb.com/vuln/430463CNA: VulDB · vdb-entry
- https://vuldb.com/vuln/430463/ctiCNA: VulDB · signature, permissions-required
- https://vuldb.com/cve/CVE-2026-121615CNA: VulDB · third-party-advisory
- https://vuldb.com/submit/1023310CNA: VulDB · third-party-advisory
- https://github.com/Zimo-666/E5600-cves/tree/main/02-mesh-login-auth-bypassCNA: VulDB · exploit
- https://www.linksys.com/CNA: VulDB · product
- https://github.com/Zimo-666/E5600-cves/tree/main/02-mesh-login-auth-bypass[email protected]
- https://vuldb.com/cve/CVE-2026-121615[email protected]
- https://vuldb.com/submit/1023310[email protected]
- https://vuldb.com/vuln/430463[email protected]
- https://vuldb.com/vuln/430463/cti[email protected]
- https://www.linksys.com/[email protected]
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