How severe is CVE-2025-29816?

CVE-2025-29816 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-29816 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-29816?

CVE-2025-29816 primarily affects Microsoft 365 Apps. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-29816?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-29816 have an EU (EUVD) identifier?

Yes. CVE-2025-29816 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-10113.

When was CVE-2025-29816 published?

CVE-2025-29816 was published on 2025-04-08 and last updated on 2026-06-17.

CVE-2025-29816

CVE-2025-29816 is a high-severity vulnerability in Microsoft 365 Apps with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-349.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-10113
Weakness: CWE-349
Affected product: Microsoft 365 Apps
Published: 2025-04-08
Last modified: 2026-06-17

Description

Improper input validation in Microsoft Office Word allows an unauthorized attacker to bypass a security feature over a network.

Frequently asked questions

What is CVE-2025-29816?: Improper input validation in Microsoft Office Word allows an unauthorized attacker to bypass a security feature over a network.
How severe is CVE-2025-29816?: CVE-2025-29816 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-29816 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-29816?: CVE-2025-29816 primarily affects Microsoft 365 Apps. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-29816?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-29816 have an EU (EUVD) identifier?: Yes. CVE-2025-29816 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-10113.
When was CVE-2025-29816 published?: CVE-2025-29816 was published on 2025-04-08 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29816

Affected products (8)

cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:*:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:*:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:*:*

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