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CVE-2026-45659

high · 8.8Actively exploited

On the CISA Known Exploited Vulnerabilities catalog

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Added 2026-07-01Remediation due 2026-07-04

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

8.8
CVSS
76.1%
EPSS (exploit prob.)
100th
EPSS percentile
2026-05-22
Published

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

Weaknesses

CWE-502

Affected products

VendorProductAffected versions
microsoftsharepoint_server< 16.0.19725.20280
microsoftsharepoint_server2016
microsoftsharepoint_server2019

Check a specific version with /api/v1/cve/match.

References

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-45659