CVE-2022-26500 KEVRansomware High · 8.8 EPSS 5.8%
Veeam Backup & Replication Remote Code Execution Vulnerability
Veeam · Backup & Replication
Summary
The flaw is an improper limitation of path names in the Backup & Replication component of Veeam's Backup & Replication product, affecting the internal API handling. An attacker who holds valid credentials on the network can reach internal API functions to upload and execute arbitrary code, requiring no user interaction and low attack complexity.
Official description · NVD
Improper limitation of path names in Veeam Backup & Replication 9.5U3, 9.5U4,10.x, and 11.x allows remote authenticated users access to internal API functions that allows attackers to upload and execute arbitrary code.
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown. Breakdown
72.8 / 100
- Exploited
- Yes, in CISA KEV
- Reports
- 0
- Tactics
- 6/15
How an attack unfolds
Based on MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. mappings. Select a step to see the evidence.How attackers get in
What they do
What can follow
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited 7 months after disclosure.
- Disclosedday 0
- First seen exploitedVulnCheck KEV evidence+7 mo
- Added to CISA KEVknown ransomware use; EU database agrees+9 mo
CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
5 TechniqueOne specific attacker behaviour in MITRE ATT&CK, such as T1190 “Exploit Public-Facing Application”. IDs with a dot, like T1059.004, are sub-techniques., grouped by TacticThe attacker’s goal at a stage of an attack in MITRE ATT&CK, such as Initial Access or Persistence. Each technique belongs to one or more tactics. in kill-chain order 5Initial AccessTA0001
Valid Accounts T1078 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details. also Persistence, Privilege Escalation, Stealth
MITRE CTID mapping of the KEV entry · how it is exploited
This vulnerability is exploited by a remote, authenticated users access to internal API functions that allows attackers to upload and execute arbitrary code. This vulnerability has been exploited by threat actors associated with AvosLocker ransomware, as identified by Kroll analysts. These actors have developed new tactics targeting backup systems, specifically leveraging vulnerabilities in Veeam Backup and Replication software (CVE-2022-26500 and CVE-2022-26501) to potentially exfiltrate data while evading detection.
Exploit Public-Facing Application T1190 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details.
MITRE CTID mapping of the KEV entry · how it is exploited
ExecutionTA0002
Command and Scripting Interpreter T1059 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details.
MITRE CTID mapping of the KEV entry · primary impact
Stealth
Masquerading T1036 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details.
MITRE CTID mapping of the KEV entry · follow-on activity
ExfiltrationTA0010
Exfiltration Over Alternative Protocol T1048 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details.
MITRE CTID mapping of the KEV entry · follow-on activity
Detection
0 rules for this CVE · 352 general rules for its techniquesRules for this CVE
0Sigma ruleAn open, vendor-neutral detection rule for log data. Security teams convert Sigma rules into searches for their own SIEM. that reference CVE-2022-26500 directly.CVE-specific rules are not available in this build. Search SigmaHQ ↗
General rules for this CVE’s techniques
These detect the technique in general, not this specific vulnerability.
Valid AccountsT107856 general rules
- Win Susp Computer Name Containing Samtheadmincriticaltest
- Account Created And Deleted Within A Close Time Framehightest
- Activity From Anonymous IP Addresshightest
- Atypical Travelhightest
- Azure AD Threat Intelligencehightest
- Azure Subscription Permission Elevation Via AuditLogshightest
- External Remote SMB Logon from Public IPhightest
- Impossible Travelhightest
Exploit Public-Facing ApplicationT1190149 general rules
- Arcadyan Router Exploitationscriticaltest
- Citrix ADS Exploitation CVE-2020-8193 CVE-2020-8195criticaltest
- Citrix Netscaler Attack CVE-2019-19781criticaltest
- Confluence Exploitation CVE-2019-3398criticaltest
- CVE-2010-5278 Exploitation Attemptcriticaltest
- CVE-2020-0688 Exchange Exploitation via Web Logcriticaltest
- CVE-2020-10148 SolarWinds Orion API Auth Bypasscriticaltest
- CVE-2020-5902 F5 BIG-IP Exploitation Attemptcriticaltest
Command and Scripting InterpreterT105995 general rules
- HackTool - Sliver C2 Implant Activity Patterncriticaltest
- Lazarus Group Activitycriticaltest
- REvil Kaseya Incident Malware Patternscriticaltest
- Turla Group Lateral Movementcriticaltest
- Windows Defender AMSI Trigger Detectedhighstable
- Windows Defender Threat Detectedhighstable
- Abusable DLL Potential Sideloading From Suspicious Locationhightest
- Add Insecure Download Source To Wingethightest
MasqueradingT103640 general rules
- Potential LSASS Process Dump Via Procdumphighstable
- CreateDump Process Dumphightest
- Forfiles.EXE Child Process Masqueradinghightest
- HackTool - XORDump Executionhightest
- Password Protected ZIP File Opened (Suspicious Filenames)hightest
- Potential SysInternals ProcDump Evasionhightest
- Process Execution From A Potentially Suspicious Folderhightest
- Process Memory Dump Via Comsvcs.DLLhightest
Exfiltration Over Alternative ProtocolT104812 general rules
- Powershell DNSExfiltrationhightest
- Suspicious Redirection to Local Admin Sharehightest
- PUA - Restic Backup Tool Executionhighexperimental
- Copy From Or To Admin Share Or Sysvol Foldermediumtest
- Data Export From MSSQL Table Via BCP.EXEmediumtest
- DNS TOR Proxiesmediumtest
- Tap Driver Installationmediumtest
- Tap Installer Executionmediumtest
Sigma rules © SigmaHQ, Detection Rule License 1.1; linked, not reproduced.
What security researchers reported
Not named in any threat report yetAlso mentioned in 50 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
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