How severe is CVE-2023-21715?

CVE-2023-21715 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-21715 being actively exploited?

Yes. CVE-2023-21715 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-02-14, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-21715?

CVE-2023-21715 affects Microsoft 365 Apps. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-21715?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-21715 have an EU (EUVD) identifier?

Yes. CVE-2023-21715 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-25882. It is also flagged as exploited in the EUVD (since 2023-02-14).

When was CVE-2023-21715 published?

CVE-2023-21715 was published on 2023-02-14 and last updated on 2026-06-17.

CVE-2023-21715

CVE-2023-21715 is a high-severity vulnerability in Microsoft 365 Apps with a CVSS 3.x base score of 7.3. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2023-02-14). The underlying weakness is classified as CWE-863.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 12% (96th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2023-02-14)
EU (EUVD) id: EUVD-2023-25882
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2023-02-14)
Weakness: CWE-863
Affected product: Microsoft 365 Apps
Published: 2023-02-14
Last modified: 2026-06-17

Description

Microsoft Publisher Security Feature Bypass Vulnerability

Frequently asked questions

What is CVE-2023-21715?: Microsoft Publisher Security Feature Bypass Vulnerability
How severe is CVE-2023-21715?: CVE-2023-21715 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-21715 being actively exploited?: Yes. CVE-2023-21715 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-02-14, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-21715?: CVE-2023-21715 affects Microsoft 365 Apps. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-21715?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-21715 have an EU (EUVD) identifier?: Yes. CVE-2023-21715 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-25882. It is also flagged as exploited in the EUVD (since 2023-02-14).
When was CVE-2023-21715 published?: CVE-2023-21715 was published on 2023-02-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*

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