CVE-2025-53770
Confirmed PUBLISHEDMicrosoft SharePoint Server Remote Code Execution Vulnerability
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing and fully testing a comprehensive update to address this vulnerability. In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.
- CVE Published
- Jul 20, 2025
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 9.8 Critical
- EPSS
- 100.0%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| Microsoft |
Microsoft SharePoint Enterprise Server 2016
|
16.0.0 to < 16.0.5513.1001 |
Affected |
| Microsoft |
Microsoft SharePoint Server 2019
|
16.0.0 to < 16.0.10417.20037 |
Affected |
| Microsoft |
Microsoft SharePoint Server Subscription Edition
|
16.0.0 to < 16.0.18526.20508 |
Affected |
CVE References
- Microsoft SharePoint Server Remote Code Execution Vulnerability msrc.microsoft.com · Vendor Advisory https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53770
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 10:37 UTC |
| The Shadowserver | 2026-06-02 00:00 UTC |
| CISA | 2026-06-02 14:06 UTC |
| Daily CyberSecurity | 2026-06-11 01:20 UTC |
Scanner Artifacts
Nuclei and Metasploit references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-53770.yaml | Jun 01, 2026 |
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 10:37:19 UTC · CVE
Used in malware
Recorded 2026-06-02 14:07:00 UTC · CVE
Proof of concept available
Recorded 2026-06-12 14:21:08 UTC · Nuclei Templates
Weaknesses (CWE)
-
Deserialization of Untrusted Data
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-53770.yaml | Jun 01, 2026 |
Recent Mentions
Daily CyberSecurity · Jun 12, 2026
The tech world faces a severe threat today. Millions of users are currently at risk due to a The post Millions at Risk: 9.8 CVSS Remote Code Execution in HTTP.sys appeared first on Daily CyberSecurity. Related posts: FiberGateway Router Hacked: Portugal’s 1.6M Homes at Risk Critical HIKVISION applyCT Flaw (CVE-2025-34067, CVSS 10.0): Unauthenticated RCE Via Fastjson SharePoint Server Under Active Zero-Day Attack (CVE-2025-53770, CVSS 9.8), No Patch Yet!
Daily CyberSecurity · Jun 11, 2026
Security administrators must urgently patch multiple critical Splunk Enterprise vulnerabilities recently disclosed by the vendor. These highly severe The post Splunk Enterprise Vulnerabilities: Patch CVSS 9.8 Flaws appeared first on Daily CyberSecurity. Related posts: High-Privilege Havoc: Splunk Patches RCE Flaw Lurking in File Previews AI Spam Threatens cURL’s Bug Bounty Program: Developer Considers Shutting It Down SharePoint Server Under Active Zero-Day Attack (CVE-2025-53770, CVSS 9.8), No Patch Yet!
Daily CyberSecurity · Jun 11, 2026
Cybersecurity experts recently disclosed five severe Spring Data vulnerabilities. Consequently, software developers must act quickly to secure their The post Spring Data Vulnerabilities: Patch Five Critical Flaws Now appeared first on Daily CyberSecurity. Related posts: AI Spam Threatens cURL’s Bug Bounty Program: Developer Considers Shutting It Down SharePoint Server Under Active Zero-Day Attack (CVE-2025-53770, CVSS 9.8), No Patch Yet! CISA Alert: Actively Exploited Zero-Days in CrushFTP, Chrome, and SysAid Added to KEV Catalog
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
nuclei · Created Unknown
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:21 UTC about 1 month ago14:21 UTC · about 1 month ago
Public PoC available
Public proof-of-concept code published
-
01:20 UTC about 1 month ago01:20 UTC · about 1 month ago
KEV confirmed by Daily CyberSecurity
Exploitation attested by an external source
-
14:07 UTC about 2 months ago14:07 UTC · about 2 months ago
First public exploitation report
Exploit observed in malware
-
14:06 UTC about 2 months ago14:06 UTC · about 2 months ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
00:00 UTC about 2 months ago00:00 UTC · about 2 months ago
KEV confirmed by The Shadowserver
Exploitation attested by an external source
-
15:34 UTC about 2 months ago15:34 UTC · about 2 months ago
Nuclei template available
Scanner coverage available
-
10:37 UTC about 2 months ago10:37 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
01:06 UTC about 1 year ago01:06 UTC · about 1 year ago
CVE published
Vulnerability disclosed publicly
-
13:25 UTC about 1 year ago13:25 UTC · about 1 year ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2025-53770
{
"cve_id": "CVE-2025-53770",
"title": "Microsoft SharePoint Server Remote Code Execution Vulnerability",
"affected_vendor": "Microsoft",
"affected_product": "Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 9.8,
"epss_score": 0.99982,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}