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CVE-2023-35311Microsoft Outlook Security Feature Bypass Vulnerability

Microsoft Outlook Security Feature Bypass Vulnerability

8.8 HIGHEPSS 15.52%⚡ Known Exploited (CISA KEV)NVD: Published

Last updated: 2026-10-07 17:43 UTC

OverviewCVSS details

8.8HIGHCVSS 3.1

Score source: microsoft (CNA)
NVD status: Published
Published: Jul 11, 2023
Assigner: microsoft

Affected

Microsoft 365 Apps for Enterprise (Microsoft)

Versions: 16.0.1 before https://aka.ms/OfficeSecurityReleases
Fixed in: https://aka.ms/OfficeSecurityReleases

+5 more products →

Exploitation

Public exploit: None listed
CISA KEV: Listed · Jul 11, 2023
KEV due date: Aug 1, 2023
Ransomware use: Unknown
SSVC: Exploitation active · Automatable no · Impact total

EPSS · FIRST, scored Nov 7

15.52%chance of exploitation in 30 days

Higher than 96.83% of CVEs

CVSS 3.1 · microsoft (CNA)

8.8High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

NVD status: Published

Overview Affected Products References

Overview

Severity

Score	Severity	Version	Vector String
8.8	HIGH	3.1microsoft (CNA)	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

Details

CVE ID: CVE-2023-35311
Status: Published
Assigner (CNA): microsoft
Published: Jul 11, 2023
Last modified: 2026-10-07 17:43 UTC
Weaknesses: CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition

Sources

NVD (unavailable at last refresh)
CVE.org
CISA KEV
FIRST EPSS

Refreshed hourly from the sources above. Last fetched 2026-11-08 14:29 UTC.