CVE-2026-44963: CWE-502 Deserialization of Untrusted Data in Veeam Backup and Replication
A vulnerability allowing remote code execution (RCE) on the Backup Server by an authenticated domain user.
AI Analysis
Technical Summary
This vulnerability involves unsafe deserialization of untrusted data within Veeam Backup and Replication, enabling an authenticated domain user to execute arbitrary code remotely on the Backup Server. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no user interaction, and high impact on confidentiality, integrity, availability, and security requirements. The vulnerability is classified under CWE-502. No vendor advisory or patch information is currently provided, and the affected versions are not explicitly stated.
Potential Impact
Successful exploitation allows an authenticated domain user to execute arbitrary code remotely on the Backup Server, potentially leading to full compromise of backup infrastructure and data. The high CVSS score reflects critical impact on confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict authenticated domain user privileges on the Backup Server to trusted personnel only and monitor for suspicious activity related to deserialization processes.
CVE-2026-44963: CWE-502 Deserialization of Untrusted Data in Veeam Backup and Replication
Description
A vulnerability allowing remote code execution (RCE) on the Backup Server by an authenticated domain user.
CVSS v4.0
Score 9.4critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves unsafe deserialization of untrusted data within Veeam Backup and Replication, enabling an authenticated domain user to execute arbitrary code remotely on the Backup Server. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no user interaction, and high impact on confidentiality, integrity, availability, and security requirements. The vulnerability is classified under CWE-502. No vendor advisory or patch information is currently provided, and the affected versions are not explicitly stated.
Potential Impact
Successful exploitation allows an authenticated domain user to execute arbitrary code remotely on the Backup Server, potentially leading to full compromise of backup infrastructure and data. The high CVSS score reflects critical impact on confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict authenticated domain user privileges on the Backup Server to trusted personnel only and monitor for suspicious activity related to deserialization processes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- hackerone
- Date Reserved
- 2026-05-08T15:00:02.447Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2899f18dd33fbd859049c5
Added to database: 6/9/2026, 10:55:45 PM
Last enriched: 6/9/2026, 11:11:00 PM
Last updated: 6/10/2026, 5:33:08 AM
Views: 16
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