How severe is CVE-2025-21096?

CVE-2025-21096 has a CVSS 3.x base score of 1.9, rated low severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2025-21096 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-2025-21096?

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

Does CVE-2025-21096 have an EU (EUVD) identifier?

Yes. CVE-2025-21096 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24424.

When was CVE-2025-21096 published?

CVE-2025-21096 was published on 2025-08-12 and last updated on 2026-06-17.

CVE-2025-21096

CVE-2025-21096 is a low-severity vulnerability with a CVSS 3.x base score of 1.9. 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: Low (CVSS 3.x base score 1.9)
CVSS v4: 1.8
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-24424
Weakness: CWE-119
Published: 2025-08-12
Last modified: 2026-06-17

Description

Improper buffer restrictions in the firmware for some Intel(R) TDX may allow a privileged user to potentially enable escalation of privilege via local access.

Frequently asked questions

What is CVE-2025-21096?: Improper buffer restrictions in the firmware for some Intel(R) TDX may allow a privileged user to potentially enable escalation of privilege via local access.
How severe is CVE-2025-21096?: CVE-2025-21096 has a CVSS 3.x base score of 1.9, rated low severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2025-21096 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-2025-21096?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-21096 have an EU (EUVD) identifier?: Yes. CVE-2025-21096 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24424.
When was CVE-2025-21096 published?: CVE-2025-21096 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-01312.html

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