CVE-2026-127276
Linksys EA8100 Web UI cookie httponly flag
A vulnerability was identified in Linksys EA8100 1.0.3.216940. Impacted is an unknown function of the component Web UI. Such manipulation leads to cookie without 'httponly' flag. It is possible to launch the attack remotely. This attack is characterized by high complexity. The exploitability is considered difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
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 |
|---|---|---|
| EA8100 Linksys |
1.0.3.216940 (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 / 6.3 medium |
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P | CNA: VulDB |
| 3.1 / 3.7 low |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:C | CNA: VulDB |
| 3.0 / 3.7 low |
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:C | CNA: VulDB |
| 2.0 / 2.6 low |
AV:N/AC:H/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:C | CNA: VulDB |
Exploit evidence
References
- https://vuldb.com/vuln/436431CNA: VulDB · vdb-entry
- https://vuldb.com/vuln/436431/ctiCNA: VulDB · signature, permissions-required
- https://vuldb.com/cve/CVE-2026-127276CNA: VulDB · third-party-advisory
- https://vuldb.com/submit/1040998CNA: VulDB · third-party-advisory
- https://github.com/geo-chen/oss/blob/main/Linksys.md#finding-4-admin-credential-stored-in-a-non-httponly-cookie-admin-authCNA: VulDB · exploit
- https://www.linksys.com/CNA: VulDB · product
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