{ "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-2023-20236", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-20236", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2023-09-13T16:39:19.418Z", "updatedAt": "2025-12-16T18:23:20.640Z", "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 the iPXE boot function of Cisco IOS XR software could allow an authenticated, local attacker to install an unverified software image on an affected device.\r\n\r This vulnerability is due to insufficient image verification. An attacker could exploit this vulnerability by manipulating the boot parameters for image verification during the iPXE boot process on an affected device. A successful exploit could allow the attacker to boot an unverified software image on the affected device.", "affected": [ { "vendor": "Cisco", "product": "Cisco IOS XR Software", "versions": [ { "version": "5.2.0", "status": "affected" }, { "version": "5.2.1", "status": "affected" }, { "version": "5.2.2", "status": "affected" }, { "version": "5.2.4", "status": "affected" }, { "version": "5.2.3", "status": "affected" }, { "version": "5.2.5", "status": "affected" }, { "version": "5.2.47", "status": "affected" }, { "version": "5.3.0", "status": "affected" }, { "version": "5.3.1", "status": "affected" }, { "version": "5.3.2", "status": "affected" }, { "version": "5.3.3", "status": "affected" }, { "version": "5.3.4", "status": "affected" }, { "version": "6.0.0", "status": "affected" }, { "version": "6.0.1", "status": "affected" }, { "version": "6.0.2", "status": "affected" }, { "version": "6.1.1", "status": "affected" }, { "version": "6.1.2", "status": "affected" }, { "version": "6.1.3", "status": "affected" }, { "version": "6.1.4", "status": "affected" }, { "version": "6.1.12", "status": "affected" }, { "version": "6.1.22", "status": "affected" }, { "version": "6.1.32", "status": "affected" }, { "version": "6.1.36", "status": "affected" }, { "version": "6.1.42", "status": "affected" }, { "version": "6.2.1", "status": "affected" }, { "version": "6.2.2", "status": "affected" }, { "version": "6.2.3", "status": "affected" }, { "version": "6.2.25", "status": "affected" }, { "version": "6.2.11", "status": "affected" }, { "version": "6.3.2", "status": "affected" }, { "version": "6.3.3", "status": "affected" }, { "version": "6.3.15", "status": "affected" }, { "version": "6.4.1", "status": "affected" }, { "version": "6.4.2", "status": "affected" }, { "version": "6.4.3", "status": "affected" }, { "version": "6.5.1", "status": "affected" }, { "version": "6.5.2", "status": "affected" }, { "version": "6.5.3", "status": "affected" }, { "version": "6.5.25", "status": "affected" }, { "version": "6.5.26", "status": "affected" }, { "version": "6.5.28", "status": "affected" }, { "version": "6.5.29", "status": "affected" }, { "version": "6.5.32", "status": "affected" }, { "version": "6.5.33", "status": "affected" }, { "version": "6.6.2", "status": "affected" }, { "version": "6.6.3", "status": "affected" }, { "version": "6.6.25", "status": "affected" }, { "version": "6.6.4", "status": "affected" }, { "version": "7.0.1", "status": "affected" }, { "version": "7.0.2", "status": "affected" }, { "version": "7.0.12", "status": "affected" }, { "version": "7.0.14", "status": "affected" }, { "version": "7.1.1", "status": "affected" }, { "version": "7.1.15", "status": "affected" }, { "version": "7.1.2", "status": "affected" }, { "version": "7.1.3", "status": "affected" }, { "version": "6.7.1", "status": "affected" }, { "version": "6.7.2", "status": "affected" }, { "version": "6.7.3", "status": "affected" }, { "version": "6.7.4", "status": "affected" }, { "version": "7.2.0", "status": "affected" }, { "version": "7.2.1", "status": "affected" }, { "version": "7.2.2", "status": "affected" }, { "version": "7.3.1", "status": "affected" }, { "version": "7.3.15", "status": "affected" }, { "version": "7.3.2", "status": "affected" }, { "version": "7.3.3", "status": "affected" }, { "version": "7.3.5", "status": "affected" }, { "version": "7.4.1", "status": "affected" }, { "version": "7.4.2", "status": "affected" }, { "version": "6.8.1", "status": "affected" }, { "version": "6.8.2", "status": "affected" }, { "version": "7.5.1", "status": "affected" }, { "version": "7.5.3", "status": "affected" }, { "version": "7.5.2", "status": "affected" }, { "version": "7.5.4", "status": "affected" }, { "version": "7.6.1", "status": "affected" }, { "version": "7.6.2", "status": "affected" }, { "version": "7.7.1", "status": "affected" }, { "version": "7.7.2", "status": "affected" }, { "version": "7.7.21", "status": "affected" }, { "version": "6.9.1", "status": "affected" }, { "version": "6.9.2", "status": "affected" }, { "version": "7.8.1", "status": "affected" }, { "version": "7.8.2", "status": "affected" }, { "version": "7.9.1", "status": "affected" }, { "version": "7.9.2", "status": "affected" } ] } ] } } }