Linked CVE review

Deploy Microsoft Microsoft Office security update KB5002880

Linked CVEs: 1
Confirmed exploited: 1
PoC or lab evidence: 0
Maximum CVSS: 9.8

Evidence is kept separate

Confirmed exploitation, public exploit material, EPSS probability and CVSS severity answer different questions. “No confirmation recorded” means the checked sources do not currently confirm exploitation. It is not proof that exploitation has not occurred.

1 of 1 linked CVEs shown

Confirmed exploitedCVSS above 9.0

CVE and description	Severity	Exploit reality	Forecast and access	Remediation
CVE-2026-58644 Immediate evidence Microsoft SharePoint Deserialization of Untrusted Data Vulnerability Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.	9.8 · CVSS 3.1 · CriticalSource: CNA	Confirmed in the wildCISA added this CVE to its Known Exploited Vulnerabilities catalogue on 2026-07-16.None recordedNo exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.	EPSS: 15.9% · 96.8th percentileForecast date: 2026-10-08NETWORK · LOW complexity · NONE privileges · NONE user interaction	Patch nowCISA confirms exploitation in the wild and lists 2026-07-19 as the remediation due date.Patch available. The Cyber Centre recommends that organizations upgrade affected Microsoft SharePoint instances to a fixed version: Affected product Affected versions Fixed versions Microsoft SharePoint Enterprise Server 2016 16.0.0 before 16.0.5561.1001 16.0.5561.1001 Microsoft SharePoint Server 2019 16.0.0 before 16.0.10417.20175 16.0.10417.20175 Microsoft SharePoint Serve