CVE-2026-82539

TOTOLINK A720R MAC Filtering cstecgi.cgi setMacFilterRules memory corruption

HIGH 8.5EPSS 0.8%

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.

Affected: TOTOLINK · A720R
CVSS v4.0 VULDB: 8.5 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:H/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
CVSS v3.1 VULDB: 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v2.0 VULDB: 8.3 HIGHAV:N/AC:L/Au:M/C:C/I:C/A:C
EPSS: 0.83% chance of exploitation in the next 30 days, 57th percentile
Published: 2026-08-30
Updated: 2026-09-01

Proof-of-concept exploits (1)

Xernary/CVE-2026-825394★ · 2026-09-12

CVE-2026-82539

Proof-of-concept exploits (1)

References

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