CVE-2026-82539 PUBLISHED

A vulnerability was determined in TOTOLINK A720R 4.1.5cu.630_B20250509. This impacts the function setMacFilterRules of the file cstecgi.cgi of the component MAC Filtering. Executing a manipulation of the argument desc can lead to memory corruption. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.

• Nicola Giuffrida finder
• Xernary (VulDB User) reporter
• Xernary (VulDB User) analyst

• VDB-397055 | TOTOLINK A720R MAC Filtering cstecgi.cgi setMacFilterRules memory corruption
• VDB-397055 | CTI Indicators (IOB, IOC, IOA)
• CVE-2026-82539 | CVE Analysis and Report
• Submit #888696 | TOTOLINK A720R V4.1.5cu.630_B20250509 Buffer Overflow
• https://github.com/Xernary/CVE-2026-82539
• https://www.totolink.net/

• Memory Corruption CWE