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Vulnerability record · CVE-2026-82539 · published 30 August 2026

CVE-2026-82539: Memory buffer overflow vulnerability

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.

8.5 CVSS 4.0 High EPSS 0.83% · top 44.0% CWE-119 · Memory buffer overflow Deferred
8.5CVSS 4.0 base score, v2 8.3
0.83%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
6References
1 Sep 2026Last modified by NVD

Description

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.

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/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:

References

LinkTags
https://github.com/Xernary/CVE-2026-82539
https://vuldb.com/cve/CVE-2026-82539
https://vuldb.com/submit/888696
https://vuldb.com/vuln/397055
https://vuldb.com/vuln/397055/cti
https://www.totolink.net/

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Source: NIST National Vulnerability Database (record CVE-2026-82539), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.