CVE-2025-53770
- EPSS 85.69%
- Veröffentlicht 20.07.2025 01:15:30
- Zuletzt bearbeitet 30.07.2025 01:00:01
- Quelle secure@microsoft.com
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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.
20.07.2025: CISA Known Exploited Vulnerabilities (KEV) Catalog
Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
SchwachstelleMicrosoft SharePoint Server on-premises contains a deserialization of untrusted data vulnerability that could allow an unauthorized attacker to execute code over a network.
BeschreibungCISA recommends configuring AMSI integration in SharePoint and deploying Defender AV on all SharePoint servers. If AMSI cannot be enabled, CISA recommends disconnecting affected products that are public-facing on the internet from service until official mitigations are available. Once mitigations are provided, apply them according to CISA and vendor instructions. Follow the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.
Erforderliche Maßnahmen| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 85.69% | 0.993 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| secure@microsoft.com | 9.8 | 3.9 | 5.9 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.