How severe is CVE-2025-62623?

CVE-2025-62623 has a CVSS 4.0 base score of 8.8, rated high severity.

Is CVE-2025-62623 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-62623?

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

Does CVE-2025-62623 have an EU (EUVD) identifier?

Yes. CVE-2025-62623 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209813.

When was CVE-2025-62623 published?

CVE-2025-62623 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2025-62623

CVE-2025-62623 is a high-severity vulnerability with a CVSS 4.0 base score of 8.8. 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-119.

Key facts

Severity: High (CVSS 4.0 base score 8.8)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209813
Weakness: CWE-119
Published: 2026-05-13
Last modified: 2026-06-17

Description

A heap-based buffer overflow in the ionic cloud driver for VMware ESXi could allow an attacker to achieve privilege escalation, potentially resulting in arbitrary code execution.

Frequently asked questions

What is CVE-2025-62623?: A heap-based buffer overflow in the ionic cloud driver for VMware ESXi could allow an attacker to achieve privilege escalation, potentially resulting in arbitrary code execution.
How severe is CVE-2025-62623?: CVE-2025-62623 has a CVSS 4.0 base score of 8.8, rated high severity.
Is CVE-2025-62623 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-62623?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-62623 have an EU (EUVD) identifier?: Yes. CVE-2025-62623 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209813.
When was CVE-2025-62623 published?: CVE-2025-62623 was published on 2026-05-13 and last updated on 2026-06-17.

References

https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-2001.html

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