CVE-2026-84420Hinoki check available

Local data exposure and disruption

Published Oct 13, 2026 · Updated Oct 14, 2026

Memory safety flaws in Citrix Workspace app for Windows allow local users to expose data and disrupt operation via local access. Citrix reports out-of-bounds reads and writes but does not disclose the component, triggering input, or failing operation. Low-privileged local access is required; the bulletin does not identify whether disruption causes a hang, crash, or another interruption.

CVSS severity5.8
Medium
EPSS probability0.09%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Memory safety flaws in Citrix Workspace app for Windows allow local users to expose data and disrupt operation via local access. Citrix reports out-of-bounds reads and writes but does not disclose the component, triggering input, or failing operation. Low-privileged local access is required; the bulletin does not identify whether disruption causes a hang, crash, or another interruption.

The record

CVE
CVE-2026-84420
Published
Oct 13, 2026
Updated
Oct 14, 2026
Vendor
Citrix
Product
Citrix Workspace app for Windows
Classifications
CWE-787, CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2603.20 CR
  2. Affected versionversion=0 <LTSR 2507 CU3
  3. Affected versionversion=0 <LTSR 2607

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Citrix · Citrix Workspace app for Windowsversion=0 <2603.20 CR; version=0 <LTSR 2507 CU3; version=0 <LTSR 2607

Published CVSS scores

5.8CitrixCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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