{"id":"CVE-2023-28771","state":"PUBLISHED","title":"Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.","description":"Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenticated attacker to execute some OS commands remotely by sending crafted packets to an affected device.","publishedAt":"2023-04-25T00:00:00.000Z","updatedAt":"2025-10-21T23:05:48.400Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Zyxel"},"assigner":"Zyxel","products":["Zyxel ZyWALL/USG series firmware","Zyxel VPN series firmware","Zyxel USG FLEX series firmware","Zyxel ATP series 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5.35","status":"affected"}]}],"references":["https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls","http://packetstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.html","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28771"],"weaknesses":["CWE-78"],"ingestedAt":"2026-10-29T20:05:52.290Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/28xxx/CVE-2023-28771.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-28771","state":"PUBLISHED","datePublished":"2023-04-25T00:00:00.000Z","dateUpdated":"2025-10-21T23:05:48.400Z","assignerShortName":"Zyxel","assignerOrgId":"96e50032-ad0d-4058-a115-4d2c13821f9f","dateReserved":"2023-03-23T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Improper error message 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