CVE-2026-58644
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
—
EPSS — probability of exploitation (30 days)
15.9%
96.7th percentile
CISA KEV
Listed
Added 2026-07-16 · patch by 2026-07-19
Weakness / dates
—
Published — · modified —
Timeline
- 2026-07-16 — Added to CISA KEV (actively exploited)
- 2026-07-19 — CISA patch-by deadline
Description
Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.