CVE-2026-53566Patch

LOWCVSS 6.8 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Out-of-bounds read vulnerability in Citrix Citrix Secure Access Client for Windows. This issue affects Citrix Secure Access Client for Windows: before 26.6.1.20.

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0.5/ 10 priority

Sources & remediation

Other references

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696734

Weakness type (CWE)

CWE-125

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Threat summary

Patch or workaround signal is available
9 mentions across 5 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 8 signals
Technical details provided in 7 signals
Disclosure: 1 classified signal
Peaked 4d ago at 4 mentions (2026-07-14); latest day: 1
9 total mentions across 5 days

Deep dive

Activity timeline9 mentions / 5d

Signal classification2 categories

Patch

888.9%

Disclosure

111.1%

Referenced assets5 URLs

By indicator

Classification over time

Date	Total	Labels

2026-07-14	4	Disclosure1Patch3
2026-07-17	1	Patch1
2026-07-18	2	Patch2
2026-07-19	1	Patch1
2026-07-24	1	Patch1

Full discourse9 posts

Daily CyberSecurity@Daily_CyberSec89d
Patch
Citrix patched CVE-2026-53565, a Citrix Secure Access vulnerability letting local users gain SYSTEM, plus the CVE-2026-53566 out-of-bounds read bug. #Citrix #CVE202653565 #PrivilegeEscalation #Vulnerability #Windows http://securityonline.info/citrix-secure-access-cve-2026-53565/
Post summary
Citrix has released a patch for CVE‑2026‑53565, a local privilege escalation flaw that lets users gain SYSTEM access, while CVE‑2026‑53566 is an out‑of‑bounds read bug.
01031486
12.9K followersView on X
Ferroque Systems Inc.@FerroqueSystems92d
Patch
Citrix has released a high-severity security update for Secure Access Client for Windows and Endpoint Analysis (EPA) Client. ⚠️ CVE-2026-53565: Local privilege escalation ⚠️ CVE-2026-53566: Out-of-bounds memory read Update affected versions: https://ferrosys.co/4wHB7M7 https://t.co/Ed9VOAlAZq
Post summary
Citrix released a high‑severity patch for Secure Access Client, detailing two CVEs (LPE and OOB memory read) without mentioning PoC code, exploits, or active attacks.
01020122
179 followersView on X
Cyber Security News@The_Cyber_News88d
Patch
📌Update Citrix Secure Access Client for Windows to version 26.6.1.20 or later 📌Update Citrix Endpoint Analysis Client for Windows to version 26.5.1.7 or later 📌For CVE-2026-53566, administrators can check DNE driver installation status via Citrix’s official documentation on gateway plugin configuration to determine exposure.
Post summary
CVE‑2026‑53566 is fixed in newer Citrix client releases; administrators should update to the mentioned versions and verify DNE driver installation status as per Citrix documentation.
010101.5K
68.6K followersView on X
iototsecnews@iototsecnews82d
Patch
Citrix の脆弱性 CVE-2026-53565／53566 が FIX：権限昇格と境界外メモリ読み取りの恐れ https://iototsecnews.jp/2026/07/18/citrix-secure-access-and-endpoint-client-for-windows-vulnerability-enables-privilege-escalation/ リモート・アクセスや接続確認のために端末へ導入されるツールは、幅広い環境で利用されるため、権限管理の不備が大きなリスクに直結しやすいという背景を持ちます。今回の Citrix Secure Access Client for Windows／Endpoint Analysis Client for Windows における脆弱性 CVE-2026-53565／CVE-2026-53566 が悪用されると、一般的な利用者アカウントだけを持つ攻撃者が、最上位の SYSTEM 権限を奪取し、端末全体の乗っ取りや内部情報の窃取といったリスクが生じ得ます。安全な運用を維持するための対策として、導入済みのクライアント端末を速やかに確認し、開発元から提供されている対策済みの最新バージョンへ更新を進める必要があります。 #Citrix #CVE202653565 #CVE202653566 #EndpointAnalysisClientforWindows #SecureAccessClientforWindows #Vulnerability
Post summary
The article announces the discovery of CVE‑2026‑53565/53566 in Citrix Secure Access Client and Endpoint Analysis Client, explains the privilege escalation and out‑of‑bounds memory read risks, and urges users to update to the latest patched version.
01000156
501 followersView on X
Rıdvan Yağlı@ridvanyagli87d
Patch
🔴 Citrix kullanıcılarına kritik güvenlik uyarısı! Windows için Citrix Secure Access Client ve Citrix Endpoint Analysis Client yazılımlarını etkileyen CVE-2026-53565 açığı, düşük yetkili bir kullanıcının SYSTEM yetkisi elde ederek sistemi tamamen ele geçirmesine olanak tanıyor. Aslında CVE-2026-53565 ve CVE-2026-53566 şeklinde iki CVE var, ancak en kritik olanı CVE-2026-53565 olduğundan etkilenen Citrix istemcilerinin mutlaka güncellenmesi öneriliyor.
Post summary
Citrix warns of a critical vulnerability (CVE-2026-53565) that lets a local user obtain SYSTEM privileges, urging affected clients to apply patches.
00010162
1.2K followersView on X
TECHEPAGES@techepages88d
Patch
🚨 Citrix Security Alert — Two vulnerabilities disclosed in Secure Access Client / Endpoint Analysis Client for Windows (CTX696734, July 14, 2026): 1) CVE-2026-53565 (CVSS 8.5, High) Improper privilege management — standard user → full SYSTEM access, no interaction needed. Affects both clients. 2) CVE-2026-53566 (CVSS 6.8, Med-High) Out-of-bounds read — can leak sensitive memory. Affects Secure Access Client only, when the DNE driver isn't installed. 🛡️ No workarounds available. Patch now: Secure Access Client → 26.6.1.20+, Endpoint Analysis Client → 26.5.1.7+.
Post summary
Citrix disclosed two new vulnerabilities affecting its Secure Access Client and Endpoint Analysis Client, providing CVEs, severity scores, technical details, and patch versions to mitigate the risks.
0001075
27 followersView on X
IntraSystems, LLC@Intra_Access92d
Patch
HIGH SEVERITY | Citrix NetScaler EPA & Secure Access CVE-2026-53565 & CVE-2026-53566 affect Windows clients. Patch immediately. -Secure Access Client → 26.6.1.20+ -EPA Client → 26.5.1.7+ Need help? servicedesk@intrasystems.com | 866.202.0020 #Citrix #NetScaler #CVE #PatchNow
Post summary
An advisory for CVE-2026-53565 and CVE-2026-53566 stresses high severity and urges users of Citrix NetScaler Secure Access and EPA clients to apply the listed patches immediately; no PoC or exploit details are included.
0000050
305 followersView on X
Vulmon Vulnerability Feed@VulmonFeeds92d
Disclosure
CVE-2026-53566 Out-of-Bounds Read Vulnerability in Citrix Secure Access Client for Windows https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-53566
Post summary
The content merely references CVE‑2026‑53566, labeling it an out‑of‑bounds read flaw in Citrix Secure Access Client for Windows, with a link to additional details but no further technical, exploit, or mitigation information.
00000131
4.1K followersView on X
Guy Leech@guyrleech92d
Patch
New @Citrix CVE Vulnerabilities have been discovered in the Citrix Secure Access Client for Windows and Citrix Endpoint Analysis Client. Refer to the information below for further details: Affected Versions: The following supported versions of Citrix Secure Access Client for Windows and Citrix Endpoint Analysis Client for Windows are affected by CVE-2026-53565: Citrix Secure Access Client for Windows versions BEFORE 26.6.1.20 Citrix Endpoint Analysis Client for Windows versions BEFORE 26.5.1.7 The following supported versions of Citrix Secure Access Client for Windows are affected by CVE-2026-53566: Citrix Secure Access Client for Windows versions BEFORE 26.6.1.20 https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696734
Post summary
Citrix released a vulnerability advisory for CVE‑2026‑53565 and CVE‑2026‑53566, listing affected Secure Access Client and Endpoint Analysis Client versions, and provided a link to the vendor’s support page for patch information.
00000372
9.9K followersView on X

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What researchers are saying

CVE-2026-53566

Cyber Security News[verified]@The_Cyber_NewsPatch

CVE‑2026‑53566 is fixed in newer Citrix client releases; administrators should update to the mentioned versions and verify DNE driver installation status as per Citrix documentation.

Rıdvan Yağlı[verified]@ridvanyagliPatch

Citrix warns of a critical vulnerability (CVE-2026-53565) that lets a local user obtain SYSTEM privileges, urging affected clients to apply patches.

TECHEPAGES[verified]@techepagesPatch

Citrix disclosed two new vulnerabilities affecting its Secure Access Client and Endpoint Analysis Client, providing CVEs, severity scores, technical details, and patch versions to mitigate the risks.

Guy Leech[verified]@guyrleechPatch

Citrix released a vulnerability advisory for CVE‑2026‑53565 and CVE‑2026‑53566, listing affected Secure Access Client and Endpoint Analysis Client versions, and provided a link to the vendor’s support page for patch information.

Daily CyberSecurity@Daily_CyberSecPatch

Citrix has released a patch for CVE‑2026‑53565, a local privilege escalation flaw that lets users gain SYSTEM access, while CVE‑2026‑53566 is an out‑of‑bounds read bug.

Ferroque Systems Inc.@FerroqueSystemsPatch

Citrix released a high‑severity patch for Secure Access Client, detailing two CVEs (LPE and OOB memory read) without mentioning PoC code, exploits, or active attacks.

iototsecnews@iototsecnewsPatch

The article announces the discovery of CVE‑2026‑53565/53566 in Citrix Secure Access Client and Endpoint Analysis Client, explains the privilege escalation and out‑of‑bounds memory read risks, and urges users to update to the latest patched version.

IntraSystems, LLC@Intra_AccessPatch

An advisory for CVE-2026-53565 and CVE-2026-53566 stresses high severity and urges users of Citrix NetScaler Secure Access and EPA clients to apply the listed patches immediately; no PoC or exploit details are included.