CVE-2026-78547

Physical integrity and availability loss via out-of-bounds write

Published Sep 11, 2026 · Updated Sep 11, 2026

Out-of-bounds write in affected Citrix Workspace app for Windows releases allows physically proximate attackers to corrupt memory or interrupt it. Citrix has not disclosed the affected component, the input that reaches it, or the operation that writes beyond its memory boundary. Affected versions are before 2603.11, before 2507.1 LTSR CU3, and before 2607 LTSR; physical access and low privileges are required.

CVSS severity4.4
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in affected Citrix Workspace app for Windows releases allows physically proximate attackers to corrupt memory or interrupt it. Citrix has not disclosed the affected component, the input that reaches it, or the operation that writes beyond its memory boundary. Affected versions are before 2603.11, before 2507.1 LTSR CU3, and before 2607 LTSR; physical access and low privileges are required.

The record

CVE
CVE-2026-78547
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
Citrix
Product
Citrix Workspace app for Windows
Classifications
CWE-787
Attack vector
physical
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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 <2507.1 LTSR CU3
  2. Affected versionversion=0 <2603.11 Current Release (CR)
  3. Affected versionversion=0 <LTSR 2607

What conditions does exploitation require?

Attack vectorphysical
Required privilegesauthenticated

What is affected?

Citrix · Citrix Workspace app for Windowsversion=0 <2507.1 LTSR CU3; version=0 <2603.11 Current Release (CR); version=0 <LTSR 2607

Published CVSS scores

4.4CitrixCVSS:4.0/AV:P/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
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.

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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