MEDIUM

CVE-2025-53771

CVSS v3

6.5

MEDIUM

EPSS Score

99.9 %

exploit probability, as of 2026-10-15

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2025-53771 yet.

Full record on NVD

Description

Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Published: 2025-07-20
Last Modified: 2025-08-14

Frequently asked questions

What is CVE-2025-53771?

Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Is CVE-2025-53771 actively exploited?

Active exploitation of CVE-2025-53771 has not been confirmed. Its EPSS score was 99.9% on 2026-10-15, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-53771?

CVE-2025-53771 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

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