How severe is CVE-2026-44963?

CVE-2026-44963 has a CVSS 4.0 base score of 9.4, rated critical severity.

Is CVE-2026-44963 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-44963?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-44963 have an EU (EUVD) identifier?

Yes. CVE-2026-44963 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35868.

When was CVE-2026-44963 published?

CVE-2026-44963 was published on 2026-06-09 and last updated on 2026-06-17.

CVE-2026-44963

CVE-2026-44963 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: Critical (CVSS 4.0 base score 9.4)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35868
Weakness: CWE-502
Published: 2026-06-09
Last modified: 2026-06-17

Description

A vulnerability allowing remote code execution (RCE) on the Backup Server by an authenticated domain user.

Frequently asked questions

What is CVE-2026-44963?: A vulnerability allowing remote code execution (RCE) on the Backup Server by an authenticated domain user.
How severe is CVE-2026-44963?: CVE-2026-44963 has a CVSS 4.0 base score of 9.4, rated critical severity.
Is CVE-2026-44963 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-44963?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-44963 have an EU (EUVD) identifier?: Yes. CVE-2026-44963 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35868.
When was CVE-2026-44963 published?: CVE-2026-44963 was published on 2026-06-09 and last updated on 2026-06-17.

References

https://www.veeam.com/kb4869

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