Read the docs
TI-2026-73744 Aliases CVE-2026-53563GHSA-jq59-m47r-c584

Persistent command execution in Citrix UniconOS

Priority LOW 30CWE-78Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · Low · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

Citrix UniconOS versions before 2607.2 CR and before 2603 LTSR CU2 are affected. An OS command injection flaw (CWE-78) lets a local user with low privileges run commands that persist. Successful exploitation gives high confidentiality impact and low integrity and availability impact. No known exploitation is reported.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Vulnerability in Citrix UniconOS leading to Persistent Command Execution This issue affects UniconOS: before 2607.2 CR and before 2603 LTSR CU2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0026 17th percentileScored 2026-11-07
Fix Fixed UniconOS (Citrix): 2607.2 CR, 2603 LTSR CU2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CitrixUniconOSbefore 2607.2 CR; before 2603 LTSR CU22607.2 CR, 2603 LTSR CU2Patch availableCNA
  • UniconOS VendorCitrix Affected before 2607.2 CR; before 2603 LTSR CU2 Fixed in 2607.2 CR, 2603 LTSR CU2 Patch available CNA

Remediation

Upgrade Citrix UniconOS to version 2607.2 CR or 2603 LTSR CU2.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA UniconOS (Citrix) Fixed in 2607.2 CR, 2603 LTSR CU2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Citrix UniconOS 2603 LTSR CU2, 2607.2 CR

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-73745 Path traversal in Citrix UniconOS allows arbitrary file read and writePriority LOW 23
    Show all 2 records →

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-53563
  2. 2026-10-14 Alias added: GHSA-jq59-m47r-c584
  3. 2026-10-14 Priority changed: MEDIUM → LOW
  4. 2026-10-15 Weakness changed · CISA ADP
  5. 2026-10-15 CISA SSVC decision points changed

References

Other 1

  • TI-2026-60195 Memory overflow vulnerability leading to Remote Code Execution or Denial of Service KEVCVSS 4.0CRITICAL 9.5
  • TI-2026-60194 Improper input validation in Citrix ADC KEVCVSS 4.0CRITICAL 9.5
  • TI-2023-10110 Improper access control in Citrix ShareFile Storage Zones Controller KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04571 Unauthenticated sensitive information disclosure in Citrix NetScaler ADC KEVCVSS 3.1CRITICAL 9.4
  • TI-2023-03284 Unauthenticated remote code execution in Citrix NetScaler ADC KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-10528 Unauthenticated remote arbitrary code execution in Citrix Gateway, Citrix ADC KEVCVSS 3.1CRITICAL 9.8
See all 418 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences