CVE-2026-84419

Local denial of service

Published Oct 13, 2026 · Updated Oct 15, 2026

Out-of-bounds writing in Citrix Workspace app for Windows allows low-privileged local users to interrupt service. Exploitation requires App Protection to be enabled; Citrix has not disclosed the affected routine or triggering input. The disclosed consequence is service interruption, but whether it causes a hang, crash, or reboot is not specified.

CVSS severity6.8
Medium
EPSS probability0.11%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds writing in Citrix Workspace app for Windows allows low-privileged local users to interrupt service. Exploitation requires App Protection to be enabled; Citrix has not disclosed the affected routine or triggering input. The disclosed consequence is service interruption, but whether it causes a hang, crash, or reboot is not specified.

The record

CVE
CVE-2026-84419
Published
Oct 13, 2026
Updated
Oct 15, 2026
Vendor
Citrix
Product
Citrix Workspace app for Windows
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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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 Hotfix 1
  3. Affected versionversion=0 <LTSR 2607 Hotfix 1

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 Hotfix 1; version=0 <LTSR 2607 Hotfix 1

Published CVSS scores

6.8CitrixCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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