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 — 3 sources updated this week
9.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.4Exploit: None knownExposed: 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)
EG Risk
42(Track)
EG Risk 42/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity94% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 9, 2026

Advisory Details (1)

Auto-updated Aug 23, 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 49× in last 7d / 234× 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.

Showing the most recent 100 of 321 total refreshes for this CVE.

  1. 2026-08-26 14:45 UTCEPSS rescore
  2. 2026-08-26 12:55 UTCGHSA enrichment
  3. 2026-08-26 08:19 UTCGHSA enrichment
  4. 2026-08-26 03:52 UTCGHSA enrichment
  5. 2026-08-25 15:54 UTCEG score recompute
  6. 2026-08-25 15:54 UTCGHSA enrichment
  7. 2026-08-25 13:48 UTCEPSS rescore
  8. 2026-08-25 11:38 UTCGHSA enrichment
  9. 2026-08-25 07:41 UTCGHSA enrichment
  10. 2026-08-25 03:50 UTCGHSA enrichment
  11. 2026-08-25 00:05 UTCGHSA enrichment
  12. 2026-08-24 20:21 UTCEG score recompute
  13. 2026-08-24 20:21 UTCGHSA enrichment
  14. 2026-08-24 14:16 UTCEPSS rescore
  15. 2026-08-24 13:20 UTCGHSA enrichment
  16. 2026-08-24 09:36 UTCEG score recompute
  17. 2026-08-24 09:36 UTCGHSA enrichment
  18. 2026-08-24 03:59 UTCGHSA enrichment
  19. 2026-08-24 00:02 UTCGHSA enrichment
  20. 2026-08-23 20:17 UTCGHSA enrichment
  21. 2026-08-23 16:33 UTCGHSA enrichment
  22. 2026-08-23 12:49 UTCGHSA enrichment
  23. 2026-08-23 09:05 UTCGHSA enrichment
  24. 2026-08-23 05:19 UTCGHSA enrichment
  25. 2026-08-23 01:29 UTCEG score recompute
Show 75 more
  1. 2026-08-23 01:29 UTCGHSA enrichment
  2. 2026-08-23 00:18 UTCEPSS rescore
  3. 2026-08-22 21:36 UTCGHSA enrichment
  4. 2026-08-22 17:34 UTCGHSA enrichment
  5. 2026-08-22 12:33 UTCGHSA enrichment
  6. 2026-08-22 08:49 UTCGHSA enrichment
  7. 2026-08-22 05:05 UTCGHSA enrichment
  8. 2026-08-22 01:20 UTCEG score recompute
  9. 2026-08-22 01:20 UTCGHSA enrichment
  10. 2026-08-21 23:48 UTCEPSS rescore
  11. 2026-08-21 21:36 UTCGHSA enrichment
  12. 2026-08-21 17:52 UTCGHSA enrichment
  13. 2026-08-21 14:08 UTCGHSA enrichment
  14. 2026-08-21 10:11 UTCGHSA enrichment
  15. 2026-08-21 06:27 UTCGHSA enrichment
  16. 2026-08-21 02:42 UTCGHSA enrichment
  17. 2026-08-20 22:56 UTCEG score recompute
  18. 2026-08-20 22:56 UTCGHSA enrichment
  19. 2026-08-20 19:01 UTCGHSA enrichment
  20. 2026-08-20 15:17 UTCGHSA enrichment
  21. 2026-08-20 09:18 UTCGHSA enrichment
  22. 2026-08-20 05:33 UTCGHSA enrichment
  23. 2026-08-20 01:49 UTCEG score recompute
  24. 2026-08-20 01:49 UTCGHSA enrichment
  25. 2026-08-19 17:03 UTCEPSS rescore
  26. 2026-08-19 16:24 UTCGHSA enrichment
  27. 2026-08-19 12:21 UTCGHSA enrichment
  28. 2026-08-19 08:23 UTCGHSA enrichment
  29. 2026-08-19 04:39 UTCGHSA enrichment
  30. 2026-08-19 00:45 UTCGHSA enrichment
  31. 2026-08-18 20:43 UTCEG score recompute
  32. 2026-08-18 20:43 UTCGHSA enrichment
  33. 2026-08-18 13:47 UTCEPSS rescore
  34. 2026-08-18 10:45 UTCGHSA enrichment
  35. 2026-08-18 06:42 UTCGHSA enrichment
  36. 2026-08-18 02:55 UTCGHSA enrichment
  37. 2026-08-17 22:17 UTCGHSA enrichment
  38. 2026-08-17 17:17 UTCEG score recompute
  39. 2026-08-17 17:17 UTCGHSA enrichment
  40. 2026-08-17 13:46 UTCEPSS rescore
  41. 2026-08-17 13:32 UTCGHSA enrichment
  42. 2026-08-17 09:48 UTCGHSA enrichment
  43. 2026-08-17 06:04 UTCGHSA enrichment
  44. 2026-08-17 01:27 UTCGHSA enrichment
  45. 2026-08-16 21:43 UTCGHSA enrichment
  46. 2026-08-16 17:59 UTCEG score recompute
  47. 2026-08-16 17:59 UTCGHSA enrichment
  48. 2026-08-16 14:55 UTCEPSS rescore
  49. 2026-08-16 14:15 UTCGHSA enrichment
  50. 2026-08-16 10:30 UTCGHSA enrichment
  51. 2026-08-16 06:46 UTCGHSA enrichment
  52. 2026-08-16 03:03 UTCEG score recompute
  53. 2026-08-16 03:03 UTCGHSA enrichment
  54. 2026-08-16 02:13 UTCEPSS rescore
  55. 2026-08-15 23:19 UTCGHSA enrichment
  56. 2026-08-15 19:35 UTCGHSA enrichment
  57. 2026-08-15 15:50 UTCGHSA enrichment
  58. 2026-08-15 12:06 UTCGHSA enrichment
  59. 2026-08-15 08:22 UTCGHSA enrichment
  60. 2026-08-15 04:38 UTCEG score recompute
  61. 2026-08-15 04:38 UTCGHSA enrichment
  62. 2026-08-15 01:29 UTCEPSS rescore
  63. 2026-08-15 00:53 UTCGHSA enrichment
  64. 2026-08-14 21:09 UTCGHSA enrichment
  65. 2026-08-14 17:26 UTCGHSA enrichment
  66. 2026-08-14 13:23 UTCGHSA enrichment
  67. 2026-08-14 09:39 UTCGHSA enrichment
  68. 2026-08-14 05:55 UTCGHSA enrichment
  69. 2026-08-14 02:11 UTCGHSA enrichment
  70. 2026-08-13 22:27 UTCEG score recompute
  71. 2026-08-13 22:27 UTCGHSA enrichment
  72. 2026-08-13 21:59 UTCEPSS rescore
  73. 2026-08-13 18:43 UTCGHSA enrichment
  74. 2026-08-13 14:59 UTCGHSA enrichment
  75. 2026-08-13 11:15 UTCGHSA enrichment

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 0% probability of exploitation in the next 30 days, which ranks it in the top 94.8% of all scored CVEs.
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

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