Patch tracker / CVE reference / CVE-2025-53771

CVE-2025-53771

CVE-2025-53771 is a medium severity Microsoft vulnerability with a CVSS score of 6.5. Its EPSS score puts the probability of exploitation in the next 30 days at 100%. Microsoft has shipped the fix: deploy one of the 5 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

Medium

6.5

CVSS

100%

EPSS, 30 days

Medium

Severity

Not in the CISA KEV catalog. EPSS exploit probability 100%. CVSS 6.5 (Medium).

This CVE is among the top 5% of tracked Microsoft CVEs by EPSS exploit probability.

Senserva AI Opinion for CVE-2025-53771

CVE-2025-53771 is a spoofing flaw in on-premises SharePoint (2016, 2019, and Subscription Edition) rated Critical with a CVSS of 9.8 and an EPSS score of 100 percent, meaning exploitation activity is essentially certain despite no CISA KEV listing yet. Any organization running self-hosted SharePoint is exposed, and the combination of critical rating and maximum exploit probability makes this a treat-it-as-exploited situation. Public-facing SharePoint deployments are the highest priority given the near-guaranteed exploit likelihood.

Do this: Apply Microsoft's SharePoint Server update for CVE-2025-53771 to all 2016, 2019, and Subscription Edition instances today, prioritizing internet-exposed servers.

AI-generated from public data, 2026-07-23. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2025-53771

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I am an IT admin assessing a vulnerability. Facts for CVE-2025-53771 (source: https://senserva.com/cve/CVE-2025-53771.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2025-53771: Medium severity Microsoft vulnerability, CVSS 6.5
- EPSS 30-day exploitation probability: 100%
- Actively exploited (CISA KEV): no
- Fixed by: KB5002753, KB5002754, KB5002759, KB5002760, KB5002768
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) What to patch or mitigate first. 4) How to check whether my devices are exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Patch this cycle

Not confirmed exploited yet, but the 30-day exploit probability is high (EPSS 100%).

Fixed by KB5002753 and 4 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.

Do this now: Patch in this maintenance window; do not let it slip to the next one.

Official patch(es) for CVE-2025-53771

High priority: EPSS puts the odds of near-term exploitation high. In Intune or Defender, confirm whether the fixing updates KB5002753, KB5002754, KB5002759, KB5002760, KB5002768 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.

Apply the Microsoft security updates below to fix CVE-2025-53771. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.

KB5002753 KB5002754 KB5002759 KB5002760 KB5002768

Scope and sources

Affected products

Fixed by the same updates

CVE-2025-53770

Authoritative references

Official CVE record (cve.org)NVD detail Microsoft MSRC FIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.