CVE-2026-121617Linksys E5600 Header upload_fw.cgi init_multipart out-of-bounds write

Beschreibung

A security flaw has been discovered in Linksys E5600 1.1.0.26. Affected by this issue is the function init_multipart of the file /cgi-bin/upload_fw.cgi of the component Header Parser. The manipulation results in out-of-bounds write. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. 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.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• VDB-430465 | Linksys E5600 Header upload_fw.cgi init_multipart out-of-bounds write vdb-entrytechnical-description
• VDB-430465 | CTI Indicators (IOB, IOC, IOA) signaturepermissions-required
• CVE-2026-121617 | CVE Analysis and Report third-party-advisory
• Submit #1023313 | Linksys E5600 1.1.0.26 Buffer Overflow - Out-of-bounds Write (CWE-787) third-party-advisory
• https://github.com/Zimo-666/E5600-cves/tree/main/04-upload-fw-multipart-overflow exploit
• https://www.linksys.com/ product