Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability
What it means
CISA Known Exploited Vulnerabilities ha pubblicato CVE-2026-45659 relativa a Microsoft SharePoint Server. La vulnerabilita risulta gia sfruttata: la verifica di esposizione e prioritaria.
Why it matters
La fonte segnala sfruttamento attivo. La priorita dipende dalla presenza della tecnologia interessata nel perimetro; il testo acquisito non consente di dedurre ulteriori impatti tecnici.
Recommended actions
- Verificare immediatamente esposizione, versioni e indicatori di compromissione.
- Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's intern
- Confermare l'applicabilita consultando la fonte ufficiale e l'inventario asset.
- Pianificare mitigazione o aggiornamento secondo criticita e rischio di interruzione.
Potential operational benefits
- Reduces exposure by ensuring proper patching and mitigation of known exploited vulnerabilities
- Improves detection time by aligning with CISA’s prioritization guidelines
- Minimizes operational impact by reducing the risk of unauthorized code execution over the network
Italian version
Microsoft SharePoint Server Vulnerability to Deserialization of Untrusted Data
Microsoft SharePoint Server contains a vulnerability that allows an authorized attacker to execute code over a network due to a deserialization of untrusted data issue. Riferimenti tecnici indicati dalla fonte: CVE-2026-45659.
Text acquired from the source
Microsoft SharePoint Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network.
- Source
- CISA Known Exploited Vulnerabilities
- Publishing entity
- CISA
- Entity type
- National authority
- Area
- North America · US
- Original language
- en · translation completed
- Publication
- 01/07/2026 02:00
- CVE
- CVE-2026-45659
- Classification
- exploited
- Vendor
- Microsoft
- Product
- SharePoint Server
- Stated country
- US
Affected products and versions
| Product | Affected release or range | Fix or verification required | Source |
|---|---|---|---|
| microsoftsharepoint server | prima di 16.0.19725.20280, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| microsoftsharepoint server | Versione 2016 | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| microsoftsharepoint server | Versione 2019 | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| MicrosoftMicrosoft SharePoint Enterprise Server 2016 | da 16.0.0, inclusa; prima di 16.0.5552.1002, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | CVE Record - microsoft |
| MicrosoftMicrosoft SharePoint Server 2019 | da 16.0.0, inclusa; prima di 16.0.10417.20128, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | CVE Record - microsoft |
| MicrosoftMicrosoft SharePoint Server Subscription Edition | da 16.0.0, inclusa; prima di 16.0.19725.20280, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | CVE Record - microsoft |
Action indicated by the source
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.