CVE-2026-58644
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
- Published Jul 14, 2026
- CVSS 9.8 critical
- 15.9% chance of exploitation in the next 30 days (EPSS)
- In CISA's Known Exploited Vulnerabilities catalog
- A fix is available