{"id":"CVE-2023-26258","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-26258","generatedAt":"2026-10-23T00:04:54.407Z","title":"Arcserve UDP through 9.0.6034 allows authentication bypass.","description":"Arcserve UDP through 9.0.6034 allows authentication bypass. The method getVersionInfo at WebServiceImpl/services/FlashServiceImpl leaks the AuthUUID token. This token can be used at /WebServiceImpl/services/VirtualStandbyServiceImpl to obtain a valid session. This session can be used to execute any task as administrator.","published":"2023-07-03T15:15:10.000Z","lastModified":"2026-06-17T05:42:55.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","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-863"],"affected":["arcserve/udp"],"epss":{"score":0.39773,"percentile":0.9862,"date":"2026-10-21","history":[{"date":"2026-09-24","score":0.39773,"percentile":0.98572}]},"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 39.8%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://support.arcserve.com/s/article/KB000015720?language=en_US","source":"cve@mitre.org"},{"url":"https://www.arcserve.com/products/arcserve-udp","tags":["Product"],"source":"cve@mitre.org"},{"url":"https://www.mdsec.co.uk/2023/06/cve-2023-26258-remote-code-execution-in-arcserve-udp-backup/","tags":["Exploit","Technical Description","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://support.arcserve.com/s/article/KB000015720?language=en_US","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.arcserve.com/products/arcserve-udp","tags":["Product"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.mdsec.co.uk/2023/06/cve-2023-26258-remote-code-execution-in-arcserve-udp-backup/","tags":["Exploit","Technical Description","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-26258","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."}