{"id":"CVE-2023-3959","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-3959","generatedAt":"2026-11-04T22:43:11.649Z","title":"Zavio CF7500, CF7300, CF7201, CF7501, CB3211, CB3212, CB5220, CB6231, B8520, B8220, and CD321 IP Cameras with firmware version M2.1.6.05 are vulnerable to multiple instances of stack-based overflows.","description":"Zavio CF7500, CF7300, CF7201, CF7501, CB3211, CB3212, CB5220,\n CB6231, B8520, B8220, and CD321 \n\nIP Cameras\n\nwith firmware version M2.1.6.05 are \nvulnerable to multiple instances of stack-based overflows. While \nprocessing XML elements from incoming network requests, the product does\n not sufficiently check or validate allocated buffer size. This may lead\n to remote code execution.\n\n","published":"2023-11-08T23:15:09.000Z","lastModified":"2026-06-17T06:15:29.000Z","status":"Modified","sourceIdentifier":"ics-cert@hq.dhs.gov","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-121","CWE-787"],"affected":["zavio/cf7500 firmware","zavio/cf7300 firmware","zavio/cf7201 firmware","zavio/cf7501 firmware","zavio/cb3211 firmware","zavio/cb3212 firmware","zavio/cb5220 firmware","zavio/cb6231 firmware","zavio/b8520 firmware","zavio/b8220 firmware","zavio/cd321 firmware"],"epss":{"score":0.48765,"percentile":0.98877,"date":"2026-11-03","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 48.8%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-23-304-03","tags":["Third Party Advisory","US Government Resource"],"source":"ics-cert@hq.dhs.gov"},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-23-304-03","tags":["Third Party Advisory","US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-3959","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}