{"id":"CVE-2022-26501","published":"2022-03-17T21:15:08Z","modified":"2026-06-17T04:35:18Z","title":"Veeam Backup & Replication Remote Code Execution Vulnerability","vendor":"Veeam","product":"Backup & Replication","tier":"core","eol":null,"description":{"text":"Veeam Backup & Replication 10.x and 11.x has Incorrect Access Control (issue 1 of 2).","provenance":"source","from":"NVD"},"summary":{"text":"Veeam Backup & Replication has an incorrect access control flaw, tracked as issue 1 of 2 and affecting the 10.x and 11.x releases. An attacker with network access can exploit it without authentication or user interaction, because the flaw involves missing authentication for critical functionality.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-31T04:53:57Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.04104,"percentile":0.90746,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2022-12-13","dueDate":"2023-01-03","ransomware":true,"requiredAction":"Apply updates per vendor instructions.","notes":"https://www.veeam.com/kb4288;  https://nvd.nist.gov/vuln/detail/CVE-2022-26501","provenance":"source"},"vulncheckKev":{"dateAdded":"2022-10-24","exploitedFirstSeen":"2022-10-24","ransomware":true,"evidence":[{"url":"https://cloudsek.com/threatintelligence/multiple-rce-vulnerabilities-affecting-veeam-backup-replication/","date":"2022-10-24"},{"url":"https://www.kroll.com/en/insights/publications/cyber/avoslocker-ransomware-update","date":"2022-12-05"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-12-13"},{"url":"https://securelist.com/cuba-ransomware/110533/","date":"2023-09-11"},{"url":"https://blog.qualys.com/vulnerabilities-threat-research/2025/05/08/inside-lockbit-defense-lessons-from-the-leaked-lockbit-negotiations","date":"2025-05-08"}],"evidenceTotal":5,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"}],"references":[{"url":"https://veeam.com","tags":["Vendor Advisory"]},{"url":"https://www.veeam.com/kb4288","tags":["Vendor Advisory"]},{"url":"https://veeam.com","tags":["Vendor Advisory"]},{"url":"https://www.veeam.com/kb4288","tags":["Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26501","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Code Execution","mappingType":"exploitation_technique","evidence":[],"comment":"This vulnerability is exploited by a remote, unauthenticated attacker to access internal API functions and send malicious code to the Veeam Distribution Service via the default TCP port 9380.\n\nThis vulnerability has been exploited by threat actors associated with the AvosLocker ransomware. Kroll analysts have observed these actors using this vulnerability, alongside CVE-2022-26500, to potentially exfiltrate data and download malicious tools while appearing as legitimate activity to evade detection.","confidence":"medium","confidenceNote":"CTID KEV capability group \"code execution\" is generic"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Code Execution","mappingType":"primary_impact","evidence":[],"comment":"This vulnerability is exploited by a remote, unauthenticated attacker to access internal API functions and send malicious code to the Veeam Distribution Service via the default TCP port 9380.\n\nThis vulnerability has been exploited by threat actors associated with the AvosLocker ransomware. Kroll analysts have observed these actors using this vulnerability, alongside CVE-2022-26500, to potentially exfiltrate data and download malicious tools while appearing as legitimate activity to evade detection.","confidence":"medium","confidenceNote":"CTID KEV capability group \"code execution\" is generic"},{"id":"T1036","name":"Masquerading","tactics":["stealth"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Code Execution","mappingType":"secondary_impact","evidence":[],"comment":"This vulnerability is exploited by a remote, unauthenticated attacker to access internal API functions and send malicious code to the Veeam Distribution Service via the default TCP port 9380.\n\nThis vulnerability has been exploited by threat actors associated with the AvosLocker ransomware. Kroll analysts have observed these actors using this vulnerability, alongside CVE-2022-26500, to potentially exfiltrate data and download malicious tools while appearing as legitimate activity to evade detection.","confidence":"medium","confidenceNote":"CTID KEV capability group \"code execution\" is generic"},{"id":"T1048","name":"Exfiltration Over Alternative Protocol","tactics":["exfiltration"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Code Execution","mappingType":"secondary_impact","evidence":[],"comment":"This vulnerability is exploited by a remote, unauthenticated attacker to access internal API functions and send malicious code to the Veeam Distribution Service via the default TCP port 9380.\n\nThis vulnerability has been exploited by threat actors associated with the AvosLocker ransomware. Kroll analysts have observed these actors using this vulnerability, alongside CVE-2022-26500, to potentially exfiltrate data and download malicious tools while appearing as legitimate activity to evade detection.","confidence":"medium","confidenceNote":"CTID KEV capability group \"code execution\" is generic"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2022-31059","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-31059","exploited":true,"exploitedSince":"2022-12-13","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"source"},{"stage":"primary","techniques":["T1059"],"provenance":"source"},{"stage":"secondary","techniques":["T1036","T1048"],"provenance":"source"}],"timeline":[{"date":"2022-03-17","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-26501","provenance":"source"},{"date":"2022-10-24","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://cloudsek.com/threatintelligence/multiple-rce-vulnerabilities-affecting-veeam-backup-replication/","provenance":"source"},{"date":"2022-12-13","kind":"kev","label":"Added to CISA KEV (known ransomware use)","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2022-12-13","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-31059","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":271},"priority":{"score":73.0,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 1468 days ago"},{"name":"Known ransomware use","points":10.0,"detail":"CISA KEV and VulnCheck KEV: Known"},{"name":"EPSS percentile","points":18.15,"detail":"percentile 0.9075"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-veeam-backup-replication-cwe-306"}}