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PatchSiren cyber security CVE debrief

CVE-2026-84420 Citirx CVE debrief

The Citrix Workspace app for Windows is vulnerable to an Out-of-Bounds Read issue. This vulnerability affects versions before 2603.20 CR, before LTSR 2607, and before LTSR 2507 CU3. Defenders should assess exposure and prioritize patching to versions 2603.20 CR, LTSR 2607, or LTSR 2507 CU3 and later. The evidence is limited to official CVE Program and NVD records, indicating a MEDIUM-severity issue with potential impacts on data confidentiality and integrity. Citrix Workspace app for Windows installations should be verified for patch level and exposure to potential Out-of-Bounds Read attacks.

Vendor
Citirx
Product
Citrix Workspace app for Windows
CVSS
MEDIUM 5.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-13
Original CVE updated
2026-10-14
Advisory published
2026-10-13
Advisory updated
2026-10-14

Who should care

Defenders of Citrix Workspace app for Windows installations should assess exposure and prioritize patching to versions 2603.20 CR, LTSR 2607, or LTSR 2507 CU3 and later. This includes IT administrators, security teams, and operators responsible for maintaining Citrix Workspace app for Windows deployments. They should verify the patch level of Citrix Workspace app for Windows installations and assess the exposure of这些

Why it matters

CVE-2026-84420 is a MEDIUM-severity Out-of-Bounds Read vulnerability in Citrix Workspace app for Windows. Defenders should assess exposure and prioritize patching to versions 2603.20 CR, LTSR 2607, or LTSR 2507 CU3 and later. Evidence is limited to official CVE Program and NVD records.

  • Verify patch level of Citrix Workspace app for Windows installations
  • Assess exposure of Citrix Workspace app for Windows installations to potential Out-of-Bounds Read attacks

Technical summary

The Out-of-bounds read vulnerability in Citrix Workspace app for Windows affects versions before 2603.20 CR, before LTSR 2607, and before LTSR 2507 CU3. This issue could allow attackers to read sensitive data, potentially leading to further exploitation. The vulnerability has a CVSS score of 5.8 and is classified as MEDIUM severity. Official CVE Program and NVD records provide information on this vulnerability.

Defensive priority

Assess exposure, prioritize patching

Recommended defensive actions

  • Assess exposure of Citrix Workspace app for Windows installations
  • Prioritize patching to versions 2603.20 CR, LTSR 2607, or LTSR 2507 CU3 and later
  • Verify inventory of Citrix Workspace app for Windows installations

Evidence notes

Official CVE Program record and NVD vulnerability detail provide information on the Out-of-Bounds Read vulnerability in Citrix Workspace app for Windows.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-84420 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-84420

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-84420 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-84420

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.