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CISA KEV additions

CISA Adds 1 Known Exploited Vulnerability to Catalog (October 15, 2026)

Source: CISA KEV Catalog · Updated 2026-10-15

Summary

On October 15, 2026, CISA added 1 vulnerability to its Known Exploited Vulnerabilities (KEV) catalog: CVE-2026-21589. A KEV listing means CISA has evidence of active exploitation. CISA sets a remediation due date for US federal civilian agencies under its binding operational directives; any organization running the affected products should treat these as patch-now priorities.

CVE-2026-21589: Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability

Atlassian · Multiple Products

Multiple Atlassian products (Bitbucket Data Center ,Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center, Crowd Data Center, Crucible and Fisheye) contain a files or directories accessible to external parties vulnerability which could allow an unauthenticated attacker to access specific files within the web application root directory in affected versions.

Federal due date
2026-10-18
Ransomware use
Unknown
Added
2026-10-15

Required action: 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.

NVD record · Atlassian KEV history

Also added to KEV in October 2026

  • October 14, 2026: CVE-2026-76519, Cisco Secure Email Gateway (Cisco Secure Email Gateway Relative Path Traversal Vulnerability)
  • October 14, 2026: CVE-2026-105134, Ahsay AhsayCBS (Ahsay AhsayCBS Command Injection Vulnerability)
  • October 14, 2026: CVE-2026-105133, Ahsay AhsayCBS (Ahsay AhsayCBS Improper Authentication Vulnerability)
  • October 14, 2026: CVE-2026-0322, Palo Alto Networks PAN-OS (Palo Alto Networks PAN-OS Code Injection Vulnerability)
  • October 13, 2026: CVE-2026-96951, Microsoft Windows (Microsoft Windows Command Injection Vulnerability)
  • October 13, 2026: CVE-2026-104935, Ivanti Connect Secure (Ivanti Connect Secure Authentication Bypass by Spoofing Vulnerability)
  • October 8, 2026: CVE-2023-22894, Strapi Strapi (Strapi Cleartext Storage of Sensitive Information Vulnerability)
  • October 8, 2026: CVE-2021-3199, ONLYOFFICE Docs (ONLYOFFICE Docs Server Path Traversal Vulnerability)
  • October 8, 2026: CVE-2016-3081, Apache Struts (Apache Struts Command Injection Vulnerability)
  • October 8, 2026: CVE-2015-5477, ISC BIND ( ISC BIND Data Processing Errors Vulnerability)
  • October 8, 2026: CVE-2015-3306, ProFTPD ProFTPD (ProFTPD Improper Access Control Vulnerability)
  • October 4, 2026: CVE-2026-88779, Citrix NetScaler (Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memor)
  • October 2, 2026: CVE-2026-102490, Zammad GmbH Zammad (Zammad GmbH Zammad Improper Privilege Management Vulnerability)
  • October 2, 2026: CVE-2026-102489, Zammad GmbH Zammad (Zammad GmbH Zammad Session Fixation Vulnerability)
  • October 1, 2026: CVE-2026-104286, Fortinet FortiMail (Fortinet FortiMail Path Traversal Vulnerability)

Check whether you run these products: our vulnerability scanner comparison covers tools that detect KEV-listed flaws. See also the KEV dashboard and KEV history by vendor.