{"id":"CVE-2026-82539","state":"PUBLISHED","title":"TOTOLINK A720R MAC Filtering cstecgi.cgi setMacFilterRules memory corruption","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.","publishedAt":"2026-08-30T10:15:09.930Z","updatedAt":"2026-09-01T18:11:17.396Z","severity":{"score":9.4,"label":"Critical","version":"4.0","vector":"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","source":"VulDB"},"assigner":"VulDB","products":["TOTOLINK A720R"],"affected":[{"vendor":"TOTOLINK","product":"A720R","versions":[{"version":"4.1.5cu.630_B20250509","status":"affected"}],"cpes":["cpe:2.3:o:totolink:a720r_firmware:*:*:*:*:*:*:*:*"],"modules":["MAC Filtering"]}],"references":["https://vuldb.com/vuln/397055","https://vuldb.com/vuln/397055/cti","https://vuldb.com/cve/CVE-2026-82539","https://vuldb.com/submit/888696","https://github.com/Xernary/CVE-2026-82539","https://www.totolink.net/"],"weaknesses":["CWE-119"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/82xxx/CVE-2026-82539.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-82539","state":"PUBLISHED","datePublished":"2026-08-30T10:15:09.930Z","dateUpdated":"2026-09-01T18:11:17.396Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-08-29T17:39:50.384Z"},"containers":{"cna":{"title":"TOTOLINK A720R MAC Filtering cstecgi.cgi setMacFilterRules memory corruption","descriptions":[{"lang":"en","value":"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":[{"vendor":"TOTOLINK","product":"A720R","versions":[{"version":"4.1.5cu.630_B20250509","status":"affected"}],"cpes":["cpe:2.3:o:totolink:a720r_firmware:*:*:*:*:*:*:*:*"],"modules":["MAC Filtering"]}],"references":[{"url":"https://vuldb.com/vuln/397055","name":"VDB-397055 | TOTOLINK A720R MAC Filtering cstecgi.cgi setMacFilterRules memory corruption","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/vuln/397055/cti","name":"VDB-397055 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/cve/CVE-2026-82539","name":"CVE-2026-82539 | CVE Analysis and Report","tags":["third-party-advisory"]},{"url":"https://vuldb.com/submit/888696","name":"Submit #888696 | TOTOLINK A720R V4.1.5cu.630_B20250509 Buffer Overflow","tags":["third-party-advisory"]},{"url":"https://github.com/Xernary/CVE-2026-82539","tags":["exploit"]},{"url":"https://www.totolink.net/","tags":["product"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":9.4,"vectorString":"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","baseSeverity":"CRITICAL"}},{"cvssV3_1":{"version":"3.1","baseScore":9.1,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R","baseSeverity":"CRITICAL"}},{"cvssV3_0":{"version":"3.0","baseScore":9.1,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R","baseSeverity":"CRITICAL"}},{"cvssV2_0":{"version":"2.0","baseScore":8.3,"vectorString":"AV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:UR"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-119","type":"CWE","lang":"en","description":"Memory Corruption"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-08-30T10:15:09.930Z"},"timeline":[{"time":"2026-08-29T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-08-29T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-08-30T11:49:01.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"Nicola Giuffrida","type":"finder"},{"lang":"en","value":"Xernary (VulDB User)","type":"reporter"},{"lang":"en","value":"Xernary (VulDB User)","type":"analyst"}],"x_generator":["VulDB PVTS v202608"]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-01T17:08:12.617954Z","id":"CVE-2026-82539","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-01T18:11:17.396Z"}}]}}}