{"id":"CVE-2021-33602","aliases":["EUVD-2021-20286","GHSA-cmvq-g5cv-ggqg"],"status":"published","title":"Denial-of-Service (DoS) Vulnerability","description":"A vulnerability affecting the F-Secure Antivirus engine was discovered when the engine tries to unpack a zip archive (LZW decompression method), and this can crash the scanning engine. The vulnerability can be exploited remotely by an attacker. A successful attack will result in Denial-of-Service of the Anti-Virus engine.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00598,"percentile":0.48903,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-10-06T09:59:21Z","modified":"2026-06-17T03:54:51Z","products":[{"vendor":"f-secure","product":"atlant"},{"vendor":"f-secure","product":"cloud_protection"},{"vendor":"f-secure","product":"f-secure endpoint protection products on windows and mac. f-secure linux security (32-bit)  f-secure linux security 64  f-secure atlant \u0026  f-secure cloud protection for salesforce"},{"vendor":"f-secure","product":"internet_gatekeeper"},{"vendor":"f-secure","product":"linux_security"}],"references":[{"url":"https://www.f-secure.com/en/business/support-and-downloads/security-advisories","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33602"},{"url":"https://github.com/advisories/GHSA-cmvq-g5cv-ggqg"}],"sources":{"cve":[{"id":"CVE-2021-33602","title":"Denial-of-Service (DoS) Vulnerability","description":"A vulnerability affecting the F-Secure Antivirus engine was discovered when the engine tries to unpack a zip archive (LZW decompression method), and this can crash the scanning engine. The vulnerability can be exploited remotely by an attacker. A successful attack will result in Denial-of-Service of the Anti-Virus engine.","status":"published","published":"2021-10-06T09:59:21Z","modified":"2024-08-03T23:50:43.182Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:10.555814Z"}],"euvd":[{"id":"EUVD-2021-20286","description":"A vulnerability affecting the F-Secure Antivirus engine was discovered when the engine tries to unpack a zip archive (LZW decompression method), and this can crash the scanning engine. The vulnerability can be exploited remotely by an attacker. A successful attack will result in Denial-of-Service of the Anti-Virus engine.","status":"published","published":"2021-10-06T09:59:21Z","modified":"2024-08-03T23:50:43Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-03T03:24:33.866739Z"}],"ghsa":[{"id":"GHSA-cmvq-g5cv-ggqg","title":"A vulnerability affecting the F-Secure Antivirus engine was discovered when the engine tries to...","description":"A vulnerability affecting the F-Secure Antivirus engine was discovered when the engine tries to unpack a zip archive (LZW decompression method), and this can crash the scanning engine. The vulnerability can be exploited remotely by an attacker. A successful attack will result in Denial-of-Service of the Anti-Virus engine.","status":"published","published":"2022-05-24T19:16:50Z","modified":"2023-01-30T05:02:36Z","updated_at":"2026-11-02T14:46:40.355653Z"}],"nvd":[{"id":"CVE-2021-33602","description":"A vulnerability affecting the F-Secure Antivirus engine was discovered when the engine tries to unpack a zip archive (LZW decompression method), and this can crash the scanning engine. The vulnerability can be exploited remotely by an attacker. A successful attack will result in Denial-of-Service of the Anti-Virus engine.","status":"published","published":"2021-10-06T10:15:07.823Z","modified":"2026-06-17T03:54:51.613Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:59.314106Z"}]}}