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  4. CVE 2026 84420 out of bounds write and out of bounds read
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Back to active CVEs
Medium · CVSS 5.8CVE-2026-84420

Out-of-Bounds Write and Out-of-Bounds ReadCVE-2026-84420

Answer in brief

CVE-2026-84420 records a Medium severity (CVSS 5.8) vulnerability in Out-of-Bounds Write and Out-of-Bounds Read. The current sources do not mark it as known exploited. The current feed maps Citirx/Citrix Workspace app for Windows (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 13, 2026Updated Oct 13, 2026Source checked Oct 13, 2026First seen by HOL Oct 13, 2026Material review Oct 13, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Citirx/Citrix Workspace app for Windows (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Citirx/Citrix Workspace app for Windowsgeneric>=0 <2603.20 CR || >=0 <LTSR 2607 || >=0 <LTSR 2507 CU32603.20 CR, LTSR 2607, LTSR 2507 CU3, 2603.20, LTSR

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Citirx/Citrix Workspace app for Windows.
  2. 2Review the reported fix. Update Citirx/Citrix Workspace app for Windows to 2603.20 CR if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 13, 2026

Sources and claim methodology

  • Source referencesupport.citrix.com
Upstream source description

Out-of-bounds read vulnerability in Citirx Citrix Workspace app for Windows. This issue affects Citrix Workspace app for Windows: before 2603.20 CR, before LTSR 2607, and before LTSR 2507 CU3.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Bridge | Out-of-bounds Read (CWE-125)Also CWE-125
  • Substance3D - Designer | Out-of-bounds Read (CWE-125)Also CWE-125
  • Substance3D - Designer | Out-of-bounds Read (CWE-125)Also CWE-125
  • CAI Content Credentials | Improper Input Validation (CWE-20)Same generic ecosystem
  • CAI Content Credentials | Improper Access Control (CWE-284)Same generic ecosystem
  • CAI Content Credentials | Improper Access Control (CWE-284)Same generic ecosystem

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-125
Source
CVE List V5
Source checked
Oct 13, 2026
References
1 linked source
Open source record