by Kastro
Paper/Archive/CVE-2026-82539

CVE-2026-82539

TOTOLINK A720R — TOTOLINK A720R MAC Filtering cstecgi.cgi setMacFilterRules memory corruption

EPSS 0.8%public exploitCVSS 9.4
critical.is priorityof 100
50
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 57.7.577 × 2011.5Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
A720R4.1.5cu.630_B20250509–CNA

Scores by source

VulDB (CNA)9.4CVSS: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
VulDB (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
VulDB (CNA)9.1CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

writeupvuldb.com/vuln/397055refvuldb.com/vuln/397055/ctiwriteupvuldb.com/cve/CVE-2026-82539writeupvuldb.com/submit/888696exploitgithub.com/Xernary/CVE-2026-82539reftotolink.net