CVE-2025-27463

CRITICALPre-NVD 9.49.4—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 95% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 4 sources updated this week
9.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] The Windows PV drivers expose various facilities to userspace. Several of these have no security descriptor, and are therefore fully accessible to unprivileged users. These are: 1. XenCons, CVE-2025-27462 2. XenIface, CVE-2025-27463 3. XenBus, CVE-2025-27464

CVSS v3
9.4
EG Score
9.4(medium)
EPSS
5.4%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 9, 2026

Advisory Details (1)

Auto-updated Jul 9, 2026
No patch confirmed yet.
generic

XSA-468 - Xen Security Advisories

https://xenbits.xen.org/xsa/advisory-468.html

Vendor Advisories for CVE-2025-27463(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 50× in last 7d / 50× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-13 02:02 UTCEG score recompute
  2. 2026-07-13 02:01 UTCGHSA enrichment
  3. 2026-07-12 22:17 UTCEG score recompute
  4. 2026-07-12 22:17 UTCGHSA enrichment
  5. 2026-07-12 18:32 UTCEG score recompute
  6. 2026-07-12 18:32 UTCGHSA enrichment
  7. 2026-07-12 14:47 UTCEG score recompute
  8. 2026-07-12 14:47 UTCGHSA enrichment
  9. 2026-07-12 11:02 UTCEG score recompute
  10. 2026-07-12 11:02 UTCGHSA enrichment
  11. 2026-07-12 07:18 UTCEG score recompute
  12. 2026-07-12 07:18 UTCGHSA enrichment
  13. 2026-07-12 05:46 UTCEPSS rescore
  14. 2026-07-12 05:46 UTCEPSS rescore
  15. 2026-07-12 03:34 UTCEG score recompute
  16. 2026-07-12 03:34 UTCGHSA enrichment
  17. 2026-07-11 23:49 UTCEG score recompute
  18. 2026-07-11 23:49 UTCGHSA enrichment
  19. 2026-07-11 20:05 UTCEG score recompute
  20. 2026-07-11 20:05 UTCGHSA enrichment
  21. 2026-07-11 16:21 UTCEG score recompute
  22. 2026-07-11 16:21 UTCGHSA enrichment
  23. 2026-07-11 12:37 UTCEG score recompute
  24. 2026-07-11 12:37 UTCGHSA enrichment
  25. 2026-07-11 08:53 UTCEG score recompute
Show 25 more
  1. 2026-07-11 08:52 UTCGHSA enrichment
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-11 05:07 UTCEG score recompute
  5. 2026-07-11 05:07 UTCGHSA enrichment
  6. 2026-07-11 01:23 UTCEG score recompute
  7. 2026-07-11 01:23 UTCGHSA enrichment
  8. 2026-07-10 21:39 UTCEG score recompute
  9. 2026-07-10 21:39 UTCGHSA enrichment
  10. 2026-07-10 17:55 UTCEG score recompute
  11. 2026-07-10 17:55 UTCGHSA enrichment
  12. 2026-07-10 14:10 UTCEG score recompute
  13. 2026-07-10 14:10 UTCGHSA enrichment
  14. 2026-07-10 10:21 UTCEG score recompute
  15. 2026-07-10 10:21 UTCGHSA enrichment
  16. 2026-07-10 06:37 UTCEG score recompute
  17. 2026-07-10 06:37 UTCGHSA enrichment
  18. 2026-07-10 02:50 UTCEG score recompute
  19. 2026-07-10 02:50 UTCGHSA enrichment
  20. 2026-07-09 23:05 UTCEG score recompute
  21. 2026-07-09 23:05 UTCGHSA enrichment
  22. 2026-07-09 19:21 UTCEG score recompute
  23. 2026-07-09 19:21 UTCGHSA enrichment
  24. 2026-07-09 15:37 UTCEG score recompute
  25. 2026-07-09 15:35 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-27463?
CVE-2025-27463 is a critical vulnerability published on July 9, 2026. [This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] The Windows PV drivers expose various facilities to userspace. Several of these have no security descriptor, and are therefore fully accessible to unprivileged users.…
When was CVE-2025-27463 disclosed?
CVE-2025-27463 was first published in the National Vulnerability Database on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-27463 actively exploited?
CVE-2025-27463 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-27463?
CVE-2025-27463 has a CVSS v3 base score of 9.4 (NVD).
How do I remediate CVE-2025-27463?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-27463, 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

Explore the affected products and dependency analysis for CVE-2025-27463

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