{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-20168", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-20168", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2023-08-23T18:07:53.428Z", "updatedAt": "2024-08-02T09:05:35.038Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": null, "summary": "A vulnerability in TACACS+ and RADIUS remote authentication for Cisco NX-OS Software could allow an unauthenticated, local attacker to cause an affected device to unexpectedly reload. This vulnerability is due to incorrect input validation when processing an authentication attempt if the directed request option is enabled for TACACS+ or RADIUS. An attacker could exploit this vulnerability by entering a crafted string at the login prompt of an affected device. A successful exploit could allow the attacker to cause the affected device to unexpectedly reload, resulting in a denial of service (DoS) condition. ", "affected": [ { "vendor": "Cisco", "product": "Cisco NX-OS Software", "versions": [ { "version": "4.2(1)SV1(4)", "status": "affected" }, { "version": "4.2(1)SV1(4a)", "status": "affected" }, { "version": "4.2(1)SV1(4b)", "status": "affected" }, { "version": "4.2(1)SV1(5.1)", "status": "affected" }, { "version": "4.2(1)SV1(5.1a)", "status": "affected" }, { "version": "4.2(1)SV1(5.2)", "status": "affected" }, { "version": "4.2(1)SV1(5.2b)", "status": "affected" }, { "version": "4.2(1)SV2(1.1)", "status": "affected" }, { "version": "4.2(1)SV2(1.1a)", "status": "affected" }, { "version": "4.2(1)SV2(2.1)", "status": "affected" }, { "version": "4.2(1)SV2(2.1a)", "status": "affected" }, { "version": "4.2(1)SV2(2.2)", "status": "affected" }, { "version": "4.2(1)SV2(2.3)", "status": "affected" }, { "version": "5.2(1)SM1(5.1)", "status": "affected" }, { "version": "5.2(1)SM1(5.2)", "status": "affected" }, { "version": "5.2(1)SM1(5.2a)", "status": "affected" }, { "version": "5.2(1)SM1(5.2b)", 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"5.2(1)SV5(1.3c)", "status": "affected" }, { "version": "8.4(1)", "status": "affected" }, { "version": "8.4(1a)", "status": "affected" }, { "version": "8.4(2)", "status": "affected" }, { "version": "8.4(2a)", "status": "affected" }, { "version": "8.4(3)", "status": "affected" }, { "version": "8.4(2b)", "status": "affected" }, { "version": "8.4(4)", "status": "affected" }, { "version": "8.4(2c)", "status": "affected" }, { "version": "8.4(4a)", "status": "affected" }, { "version": "8.4(5)", "status": "affected" }, { "version": "8.4(2d)", "status": "affected" }, { "version": "8.4(6)", "status": "affected" }, { "version": "8.4(2e)", "status": "affected" }, { "version": "8.4(6a)", "status": "affected" }, { "version": "8.4(7)", "status": "affected" }, { "version": "8.4(2f)", "status": "affected" }, { "version": "9.3(1)", "status": "affected" }, { "version": "9.3(2)", "status": "affected" }, { "version": "9.3(3)", "status": "affected" }, { "version": "9.3(4)", "status": "affected" }, { "version": "9.3(5)", "status": "affected" }, { "version": "9.3(6)", "status": "affected" }, { "version": "9.3(7)", "status": "affected" }, { "version": "9.3(7a)", "status": "affected" }, { "version": "9.3(8)", "status": "affected" }, { "version": "9.3(9)", "status": "affected" }, { "version": "9.3(10)", "status": "affected" }, { "version": "9.3(11)", "status": "affected" }, { "version": "7.3(6)N1(1)", "status": "affected" }, { "version": "7.3(5)D1(1)", "status": "affected" }, { "version": "7.3(7)N1(1)", "status": "affected" }, { "version": "7.3(7)N1(1a)", "status": "affected" }, { "version": "7.3(7)N1(1b)", "status": "affected" }, { "version": "7.3(6)D1(1)", "status": "affected" }, { "version": "7.3(8)N1(1)", "status": "affected" }, { "version": "7.3(7)D1(1)", "status": "affected" }, { "version": "7.3(9)N1(1)", "status": "affected" }, { "version": "10.1(1)", "status": "affected" }, { "version": "10.1(2)", "status": "affected" }, { "version": "10.1(2t)", "status": "affected" }, { "version": "8.5(1)", "status": "affected" }, { "version": "7.3(10)N1(1)", "status": "affected" }, { "version": "7.3(8)D1(1)", "status": "affected" }, { "version": "10.2(1)", "status": "affected" }, { "version": "10.2(1q)", "status": "affected" }, { "version": "10.2(2)", "status": "affected" }, { "version": "10.2(3)", "status": "affected" }, { "version": "10.2(3t)", "status": "affected" }, { "version": "10.2(4)", "status": "affected" }, { "version": "10.2(5)", "status": "affected" }, { "version": "7.3(9)D1(1)", "status": "affected" }, { "version": "7.3(11)N1(1)", "status": "affected" }, { "version": "7.3(12)N1(1)", "status": "affected" }, { "version": "10.3(1)", "status": "affected" }, { "version": "10.3(2)", "status": "affected" }, { "version": "7.3(13)N1(1)", "status": "affected" } ] } ] } } }