CISA Adds Three Known Exploited Vulnerabilities to Catalog

TL;DR

CISA has added three new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2023-49105 ownCloud Improper Authentication Vulnerability CVE-2026-53362 Linux Kernel Unspecified Vulnerability CVE-2026-66384 JFrog Artifactory Improper Limitation of a Pathname to a Restricted Directory Vulnerability  These types of vulnerabilities are a frequent attack vector 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.

What Happened

CISA Adds Three Known Exploited Vulnerabilities to Catalog, reported by CISA.

CISA has added three new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2023-49105 ownCloud Improper Authentication Vulnerability CVE-2026-53362 Linux Kernel Unspecified Vulnerability CVE-2026-66384 JFrog Artifactory Improper Limitation of a Pathname to a Restricted Directory Vulnerability  These types of vulnerabilities are a frequent attack vector 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.

For the full technical details, see the original report.

Why It Matters for Businesses

This development could affect organizations that rely on the impacted technologies or services. Unpatched systems, misconfigured infrastructure, or lack of monitoring can leave businesses exposed to exploitation, data breaches, and regulatory penalties.

How to Check Your Exposure

Run a free scan on NEL Professional's Cyber Risk Scanner to check whether your domain is affected. The scan covers SSL/TLS, security headers, DNS configuration, email authentication, and more across 16 modules.

Check Your Domain Security

Mitigation Steps

• Patch immediately, Apply vendor patches or updates as soon as they are available.
• Review configurations, Check firewall rules, access controls, and security headers.
• Monitor logs, Watch for indicators of compromise (IOCs) related to this threat.
• Update security policies, Ensure incident response plans cover this type of threat.
• Run a security scan, Use automated tools to verify your exposure.

Need Expert Help?

If your organization needs help assessing or remediating this issue, hire a verified cybersecurity specialist through NEL Professionals.

Get up to 100 scans or unlimited lifetime access starting at $15.

Comments (0)

No comments yet. Be the first to comment!