CVE-2025-35991
CVE-2025-35991 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.6. 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-665.
Key facts
- Severity: Medium (CVSS 4.0 base score 5.6)
- EPSS exploit prediction: 0% (1st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-209793
- Weakness: CWE-665
- Published:
- Last modified:
Description
Improper initialization in the UEFI firmware for some Intel platforms within Ring 0: Bare Metal OS may allow an information disclosure. System software adversary with a privileged user combined with a high complexity attack may enable data exposure. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
Frequently asked questions
- What is CVE-2025-35991?
- Improper initialization in the UEFI firmware for some Intel platforms within Ring 0: Bare Metal OS may allow an information disclosure. System software adversary with a privileged user combined with a high complexity attack may enable data exposure. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
- How severe is CVE-2025-35991?
- CVE-2025-35991 has a CVSS 4.0 base score of 5.6, rated medium severity.
- Is CVE-2025-35991 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-2025-35991?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-35991 have an EU (EUVD) identifier?
- Yes. CVE-2025-35991 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209793.
- When was CVE-2025-35991 published?
- CVE-2025-35991 was published on 2026-05-12 and last updated on 2026-06-17.
References
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