Microsoft Publisher Security Feature Bypass Vulnerability

cisa required action Apply updates per vendor instructions.

1. 2023-02-14 Added to CISA KEV
2. 2023-02-14 Published
3. 2023-03-07 CISA patch deadline
4. 2025-02-04 CISA SSVC: exploitation active

Added

3 y ago (2023-02-14)

Patch by

2023-03-07 (3 y ago)

Ransomware

Not known

Required action

Apply updates per vendor instructions.

Vendor, product

Microsoft, Office

CISA name

Microsoft Office Publisher Security Feature Bypass Vulnerability

How it is exploited and what it leads to, in MITRE ATT&CK terms.

• T1204.002 Malicious File exploitation

kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use

Exploitation

Active, exploited in the wild

Automatable

no

Technical impact

total

Assessed

21 mo ago (2025-02-04)

12.01% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

• Microsoft Microsoft 365 Apps for Enterprise

Weakness

• CWE-863 Incorrect Authorization

• msrc.microsoft.com /update-guide/vulnerability/CVE-2023-21715

  vendor-advisory, patch

• cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21715

  government-resource, us-government-resource

• CVE List CVE-2023-21715
• NVD CVE-2023-21715

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.