Critical CVSS 7.4 EPSS 0.00559 2026-05 archive

Executive Summary

Exposure of sensitive information to an unauthorized actor in Microsoft Authenticator allows an unauthorized attacker to disclose information over a network.

Overview

7.4
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Information Disclosure
Released May 12 2026
Last Updated May 12 2026
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00559 — 0.4205 percentile
NVD CVSS 7.4 HIGH — differs from MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Changed
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 8.3

EPSS Score

0.00559
probability of exploitation in the next 30 days
0.4205 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

2 affected products
Product KB Article Severity Impact Restart Required
Microsoft Authenticator for Android Release Notes (Security Update) Critical Information Disclosure No
Microsoft Authenticator for IOS Release Notes (Security Update) Critical Information Disclosure No

Patches

1 patch
Article Type Restart
Release Notes Security Update No

Known Exploits

Acknowledgments

Sridhar Periyasamy