VulnTideExploited vulnerabilities, by vendor. Data as of 28 Oct 2026.
Known exploitedIn CISA's KEV catalog since 14 February 2023Ransomware use: unknown
Microsoft Office

CVE-2023-21715: Microsoft Office Publisher Security Feature Bypass Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 14 Feb 2023, the same day the CVE record was published.

How likely is exploitation in the next 30 days?
12%

EPSS score, percentile 96.1 of all scored records

How severe?
7.3 High

CVSS v3.1 base score, given by the CNA

What should I do?

Required action (CISA), due 7 Mar 2023: Apply updates per vendor instructions.

Advisories and patches (1)

Which versions are affected?

Affected: 16.0.1

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

Apply updates per vendor instructions.

CISA due date for this action: 7 March 2023.

Advisories and patches

Linked from CISA's catalog entry

Affected products and versions

As listed in the CVE record.

Microsoft Microsoft 365 Apps for Enterprise
StatusVersions
Affected16.0.1

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Microsoft Office Publisher contains a security feature bypass vulnerability that allows for a local, authenticated attack on a targeted system.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

  • CISA added CVE-2023-21715 to its Known Exploited Vulnerabilities (KEV) catalog on 14 Feb 2023.
  • CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
  • The due date CISA sets for the required action is 7 Mar 2023.
  • The CVE record was published on 14 Feb 2023, the same day it was added to KEV.
  • The CVE record carries a CVSS v3.1 base score of 7.3 (High), given by its CNA.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 12% (percentile 96.1), as of 28 Oct 2026.
  • CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

Microsoft Publisher Security Feature Bypass Vulnerability

Microsoft Publisher Security Feature Bypass Vulnerability

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

DateEvent
14 Feb 2023CVE record published
14 Feb 2023Added to CISA KEV
7 Mar 2023CISA due date for the required action
19 Aug 2026CVE record last updated

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