CVE-2025-20109

HIGHNVD 7.87.8—

7.8

Improper Isolation or Compartmentalization in the stream cache mechanism for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege via local access.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 7.8%
KEV: Not listed

Published

August 12, 2025

Last Modified

April 15, 2026

References (2)

secure@intelhttps://intel.com/content/www/us/en/security-center/advisory/intel-sa-01249.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/10/msg00027.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-653

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2025-20109?

CVE-2025-20109 is a high vulnerability published on August 12, 2025. Improper Isolation or Compartmentalization in the stream cache mechanism for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege via local access.

When was CVE-2025-20109 disclosed?

CVE-2025-20109 was first published in the National Vulnerability Database on August 12, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-20109 actively exploited?

CVE-2025-20109 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-20109?

CVE-2025-20109 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2025-20109?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-20109, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-20109

📅 Published

🔄 Last Modified

🔗 References (2)