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HomeCVEsCVE-2025-53770

CVE-2025-53770

Published: January 25, 2026
Last updated:23 hours ago (January 25, 2026)
Exploit: YesZero-day: YesPatch: YesTrend: Viral
TL;DR
Updated January 25, 2026

CVE-2025-53770 is a critical severity vulnerability with a CVSS score of 9.8. Exploits are available; patches have been released and should be applied urgently. This is classified as a zero-day vulnerability.

Key Points
  • 1Critical severity (CVSS 9.8/10)
  • 2EPSS: 91.00% - very high likelihood of exploitation
  • 3Public exploits are available
  • 4Vendor patches are available
  • 5Strobes Priority Score: 999/1000 (Critical)
  • 6Affects products from: Microsoft
Severity Scores
CVSS v39.8
CVSS v20.0
Priority Score999.0
EPSS Score91.0
Critical
Exploitation LikelihoodCritical
91.00%EPSS

Very high probability of exploitation in the next 30 days

Immediate patching required
91.00%
EPSS
9.8
CVSS
Yes
Exploit
Yes
Patch
Critical Priority
high EPSS • exploit exists • critical severity • high priority

EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.

Description

Microsoft SharePoint Server on-premises contains a deserialization of untrusted data vulnerability that could allow an unauthorized attacker to execute code over a network. This vulnerability could be chained with CVE-2025-53771. CVE-2025-53770 is a patch bypass for CVE-2025-49704, and the updates for CVE-2025-53770 include more robust protection than those for CVE-2025-49704.

CVSS v3 Breakdown
Attack Vector:Network
Attack Complexity:Local
Privileges Required:Network
User Interaction:Network
Scope:Unchanged
Confidentiality:High
Integrity:High
Availability:High
Exploit References
Exploit-DBArstechnica.comTherecord.mediaBleepingcomputer.comCisa.govCisa.govDarkreading.comMetasploitGitHubGitHub
Patch References
Forbes.com[email protected]Vendor AdvisoryZeroday CZ
Trend Analysis
Viral
Vulnerable Products
VendorProduct
MicrosoftSharepoint Server
Advisories
CISA: Microsoft SharePoint Server on-premises contains a deserialization of untrusted data vulnerability that could allow an unauthorized attacker to execute code over a network. This vulnerability could be chained with CVE-2025-53771. CVE-2025-53770 is a patch bypass for CVE-2025-49704, and the updates for CVE-2025-53770 include more robust protection than those for CVE-2025-49704.
GitHub AdvisoryNVD
Zeroday Initiative:
Cite This Page
APA Format
Strobes VI. (2026). CVE-2025-53770 - CVE Details and Analysis. Strobes VI. Retrieved January 26, 2026, from https://vi.strobes.co/cve/CVE-2025-53770
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