CVE-2026-50522

Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

84.61% chance of exploitation in the next 30 days, 100th percentile

CISA KEV

added 2026-07-22

Published

2026-07-14

Updated

2026-08-31

Proof-of-concept exploits (4)

• 4minx/CVE-2026-5052240★ · 2026-08-15
• HORKimhab/CVE-2026-505220★ · 2026-08-24
• ChPratik/CVE-2026-505220★ · 2026-07-27
• darses/CVE-2026-505220★ · 2026-07-30

References

• CVE Record
• NVD entry

Related

• CVE-2024-8682
• CVE-2026-14266
• CVE-2026-60137
• CVE-2026-63030
• CVE-2026-64638
• CVE-2026-72898