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PatchSiren cyber security CVE debrief

CVE-2026-44963 Veeam CVE debrief

CVE-2026-44963 is a critical vulnerability with a CVSS score of 9.4, allowing remote code execution (RCE) on a Backup Server by an authenticated domain user. The vulnerability was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-44963) and last modified on [cveModifiedAt](https://nvd.nist.gov/vuln/detail/CVE-2026-44963).

Vendor
Veeam
Product
Backup and Replication
CVSS
CRITICAL 9.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-10
Advisory published
2026-06-09
Advisory updated
2026-06-10

Who should care

Administrators and users of Backup Servers, particularly those using Veeam products, should be aware of this vulnerability and take immediate action to mitigate the risk.

Technical summary

The vulnerability has a CVSS vector of CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. It is classified under CWE-502.

Defensive priority

High

Recommended defensive actions

  • Apply patches or updates provided by the vendor as soon as possible.
  • Restrict access to the Backup Server to only necessary personnel.
  • Monitor the Backup Server for suspicious activity.

Evidence notes

The vendor is identified as Unknown Vendor, but there is evidence suggesting the product may be related to Veeam.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44963 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44963

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-44963 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44963

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.