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CISA Adds Three Known Exploited Vulnerabilities to Catalog ↗ source

July 16, 2026 CISA Alert

Summary

CVE-2026-25089 Fortinet FortiSandbox OS Command Injection Vulnerability CVE-2026-39808 Fortinet FortiSandbox OS Command Injection Vulnerability CVE-2026-58644 Microsoft SharePoint Deserialization of Untrusted Data Vulnerability These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. BOD 26-04 reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s KEV Catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes basic expectations for when agencies must check whether threat actors compromised the system before the patch was applied. Aware of an exploited vulnerability not currently listed in the KEV Catalog?

News Coverage

DateSourceArticle
2026-07-17 The Hacker News CISA Adds Exploited SharePoint RCE Zero-Day CVE-2026-58644 to KEV CVE-2026-58644

Articles from the monitored vendor research blogs and security news feeds that reference a CVE cited in this publication, or name the campaign it covers. Coverage begins when feed monitoring started; earlier articles are not indexed.

CVEs Referenced in This Publication

CVECVSSAffected
CVE-2026-58644 9.8 Critical Microsoft SharePoint Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.
CVE-2026-25089 9.1 Critical Fortinet FortiSandbox Fortinet FortiSandbox, FortiSandbox Cloud, and FortiSandbox PaaS contain an OS command injection vulnerability that allows an unauthenticated attacke…
CVE-2026-39808 9.1 Critical Fortinet FortiSandbox Fortinet FortiSandbox contains an OS command injection vulnerability that could allow an unauthenticated attacker to execute unauthorized code or com…

Extracted from the publication text. Each CVE links to its tracked detail page.

Vendors Named in This Publication

Each vendor links to its Known Exploited Vulnerabilities catalog page. Only vendors that appear in the KEV catalog are listed, either because the publication cites one of their KEV entries or because it names them directly.