Critical CVSS 9.8 EPSS 0.00346 2025-10 archive

Executive Summary

Improper access control in Azure Event Grid allows an unauthorized attacker to elevate privileges over a network.

Overview

9.8
CVSS CRITICAL
Critical
MS Severity
Not Exploited
MS Exploit Status
N/A
MS Exploit Likelihood
Category Elevation of Privilege
Released Oct 14 2025
Last Updated Oct 14 2025
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00346 — 0.26282 percentile
NVD CVSS 9.8 CRITICAL — differs from MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
Low
INTEGRITY
Low
AVAILABILITY
Low
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.4

EPSS Score

0.00346
probability of exploitation in the next 30 days
0.26282 percentile - updated 2026-06-21
View on FIRST.org

Known Exploits

Acknowledgments