How severe is CVE-2026-64633?

CVE-2026-64633 has a CVSS 4.0 base score of 10.0, rated critical severity.

Is CVE-2026-64633 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-64633?

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.

When was CVE-2026-64633 published?

CVE-2026-64633 was published on 2026-08-04 and last updated on 2026-08-05.

CVE-2026-64633

CVE-2026-64633 is a critical-severity vulnerability with a CVSS 4.0 base score of 10.0. 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-94.

Key facts

Severity: Critical (CVSS 4.0 base score 10.0)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Published: 2026-08-04
Last modified: 2026-08-05

Description

A vulnerability allowing remote unauthenticated code execution on the agent host.

Frequently asked questions

What is CVE-2026-64633?: A vulnerability allowing remote unauthenticated code execution on the agent host.
How severe is CVE-2026-64633?: CVE-2026-64633 has a CVSS 4.0 base score of 10.0, rated critical severity.
Is CVE-2026-64633 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-64633?: 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.
When was CVE-2026-64633 published?: CVE-2026-64633 was published on 2026-08-04 and last updated on 2026-08-05.

References

https://www.veeam.com/kb4892

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