CVE-2026-121617 PUBLISHED

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

Assigner: VulDB
Reserved: 03.11.2026 Published: 04.11.2026 Updated: 04.11.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
CVSS Score: 8.7

Product Status

Vendor Linksys
Product E5600
Versions
  • Version 1.1.0.26 is affected

Credits

  • liuyingqi (VulDB User) reporter
  • VulDB CNA Team coordinator

References

Problem Types

  • Out-of-bounds Write CWE
  • Memory Corruption CWE