CVE-2026-45659

Vendor

Microsoft

Product

SharePoint Server

EPSS

0.43 (p99)

CISA KEV

listed

Exposure class

Collaboration

Every item in the archive that references this CVE, highest rank first. Headlines open the publisher.

1. 62
   KEV CISA KEV 1 Jul 2026

   Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability

   Microsoft SharePoint Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network.

   KEV Fix available CVE-2026-45659 Microsoft
2. 64
   CISA advisory CISA 14 Jul 2026

   CISA Urges SharePoint Hardening After New Exploitations

   Update July 16, 2026 : CISA has updated this Alert to reflect the addition of CVE-2026-58644 to its Known Exploited Vulnerabilities (KEV) Catalog on July 16, 2026. CISA is aware of active exploitation of vulnerabilities…

   Exploited EPSS 0.43 CVE-2026-32201CVE-2026-45659CVE-2026-56164+2 more Microsoft
3. 46
   CISA advisory CISA 1 Jul 2026

   CISA Adds One Known Exploited Vulnerability to Catalog

   CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2026-45659 Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability This…

   Exploited CVE-2026-45659 Microsoft