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CVE-2023-23397Microsoft Outlook Elevation of Privilege Vulnerability

Microsoft Outlook Elevation of Privilege Vulnerability

9.8 CRITICALEPSS 97.15%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 05:37 UTC

OverviewCVSS details

9.8CRITICALCVSS 3.1

Score source: microsoft (CNA)
NVD status: Analyzed
Published: Mar 14, 2023
Assigner: microsoft

Affected

Microsoft Office LTSC 2021 (Microsoft)

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

+4 more products →

Exploitation

Public exploit: None listed
CISA KEV: Listed · Mar 14, 2023
KEV due date: Apr 4, 2023
Ransomware use: Unknown
SSVC: Exploitation active · Automatable no · Impact total

EPSS · FIRST, scored Nov 8

97.15%chance of exploitation in 30 days

Higher than 99.89% of CVEs

CVSS 3.1 · microsoft (CNA)

9.8Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

CVSS 3.1 · microsoft (CNA)

9.8Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

NVD status: Analyzed

Overview Affected Products References

Overview

Severity

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

CISA required action

⚡ Known exploited · remediation due Apr 4, 2023

Apply updates per vendor instructions.

Details

CVE ID: CVE-2023-23397
Status: Analyzed
Assigner (CNA): microsoft
Published: Mar 14, 2023
Last modified: 2026-06-17 05:37 UTC
Weaknesses: CWE-20 · Improper Input Validation
CWE-294

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 15:07 UTC.