CVE-2026-82539CWE-119

CVE-2026-82539

Critical · published August 30, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
57.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
9.4 · CVSS: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
EPSS
0.00834 · 57.2th percentile
Weakness
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
Published
2026-08-30T15:17Z
References (6)
https://github.com/Xernary/CVE-2026-82539 · [email protected]https://vuldb.com/cve/CVE-2026-82539 · [email protected]https://vuldb.com/submit/888696 · [email protected]https://vuldb.com/vuln/397055 · [email protected]https://vuldb.com/vuln/397055/cti · [email protected]https://www.totolink.net/ · [email protected]
EPSS history
Timeline
  • 01 SEP 03:32Z
    EPSS moved — → 1%
    epss
  • 30 AUG 10:15Z
    TOTOLINK A720R MAC Filtering cstecgi.cgi setMacFilterRules memory corruption
    cvelistv5