CISA Adds Three Known Exploited Vulnerabilities to Catalog
CISA adds three actively exploited vulnerabilities to KEV catalog including Fortinet and Microsoft flaws.
Summary
CISA has added three newly exploited vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog: two Fortinet FortiSandbox OS command injection flaws (CVE-2026-25089, CVE-2026-39808) and one Microsoft SharePoint deserialization vulnerability (CVE-2026-58644). The agency reinforced BOD 26-04 requirements for federal agencies to prioritize rapid remediation of these high-risk vulnerabilities on publicly exposed assets. CISA encourages all organizations to adopt risk-based vulnerability management and monitor the KEV Catalog.
Full text
Alert CISA Adds Three Known Exploited Vulnerabilities to Catalog Release DateJuly 16, 2026 CISA has added three new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. 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. While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. Aware of an exploited vulnerability not currently listed in the KEV Catalog? Submit it for potential addition through CISA’s KEV Nomination Form. Potential KEV additions must have a CVE ID, evidence of exploitation, and clear mitigation guidance. This product is provided subject to this Notification and this Privacy & Use policy. Please share your thoughts We recently updated our anonymous product survey; we welcome your feedback.
Indicators of Compromise
- cve — CVE-2026-25089
- cve — CVE-2026-39808
- cve — CVE-2026-58644