How severe is CVE-2025-20077?

CVE-2025-20077 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-20077 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-20077?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-20077 have an EU (EUVD) identifier?

Yes. CVE-2025-20077 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24437.

When was CVE-2025-20077 published?

CVE-2025-20077 was published on 2025-08-12 and last updated on 2026-06-17.

CVE-2025-20077

CVE-2025-20077 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. 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-401.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 5.6
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-24437
Weakness: CWE-401
Published: 2025-08-12
Last modified: 2026-06-17

Description

Missing release of memory after effective lifetime in the UEFI OobRasMmbiHandlerDriver module for some Intel(R) reference server platforms may allow a privileged user to enable denial of service via local access.

Frequently asked questions

What is CVE-2025-20077?: Missing release of memory after effective lifetime in the UEFI OobRasMmbiHandlerDriver module for some Intel(R) reference server platforms may allow a privileged user to enable denial of service via local access.
How severe is CVE-2025-20077?: CVE-2025-20077 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-20077 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-20077?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-20077 have an EU (EUVD) identifier?: Yes. CVE-2025-20077 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24437.
When was CVE-2025-20077 published?: CVE-2025-20077 was published on 2025-08-12 and last updated on 2026-06-17.

References

https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01300.html

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