Patch tracker / CVE reference / CVE-2025-53770

CVE-2025-53770

CVE-2025-53770 is a critical severity Microsoft vulnerability with a CVSS score of 9.8. It is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it in the wild, including in ransomware campaigns, which makes it a fix-first item. 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

CriticalCISA KEVRansomware

9.8

CVSS

100%

EPSS, 30 days

Critical

Severity

Yes

Exploited in the wild

Listed in the CISA Known Exploited Vulnerabilities catalog, confirmed exploited in the wild. EPSS exploit probability 100%. CVSS 9.8 (Critical). Linked to ransomware activity.

This CVE is among the top 5% of tracked Microsoft CVEs by EPSS exploit probability, and one of 3 actively-exploited CVEs in July 2025.

Senserva Watchevery change we have recorded for this one

What changed, and when

Drawn by Senserva Vivid from the Senserva change record. Hover any point for its date and value.

2025-07-20 added to the CISA KEV catalog by CISA
2026-07-17 EPSS first scored at 100.0%
2026-07-27 EPSS 100.0% to 99.9%
2026-07-29 EPSS 99.9% to 100.0%

Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.

Senserva AI Opinion for CVE-2025-53770

CVE-2025-53770 is a Critical (CVSS 9.8) remote code execution flaw in on-premises SharePoint (Enterprise Server 2016, Server 2019, and Subscription Edition), and it is being actively exploited in the wild with confirmed ransomware use. It landed in CISA KEV on 2025-07-20 and carries a 100 percent EPSS exploit probability, meaning attacks against unpatched servers are already happening rather than theoretical. Anyone running self-hosted SharePoint is exposed; SharePoint Online is not in the affected list.

Do this: Apply Microsoft's SharePoint security update to all 2016, 2019, and Subscription Edition servers now and rotate machine keys, then hunt for signs of compromise on any server that was internet-facing before patching.

AI-generated from public data, 2026-07-22. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2025-53770

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-2025-53770 (source: https://senserva.com/cve/CVE-2025-53770.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2025-53770: Critical severity Microsoft vulnerability, CVSS 9.8
- EPSS 30-day exploitation probability: 100%
- Actively exploited (CISA KEV): YES, ransomware-linked
- 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 immediately

Exploited in the wild and used in ransomware campaigns.

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: Move this ahead of everything else in the queue, then verify the fix actually landed on every exposed device.

Official patch(es) for CVE-2025-53770

Treat as urgent: it is being exploited in the wild (CISA KEV), so patch ahead of items that are not. 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-2025-53770. 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-2025-53771

Authoritative references

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

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