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CVE-2026-53566— Out-of-bounds memory read

Quick assessment

Affected
Citrix Citrix Secure Access Client for Windows
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Citrix secure access client是美国Citrix公司的一个安全远程访问客户端。 Citrix Secure Access Client 26.6.1.20之前版本存在缓冲区错误漏洞，该漏洞源于存在越界读取问题。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
Citrix Citrix Secure Access Client for Windows < 26.6.1.20 affected
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I. Basic Information for CVE-2026-53566

Vulnerability Information
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Vulnerability Title
Out-of-bounds memory read
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Citrix Secure Access Client 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Citrix secure access client是美国Citrix公司的一个安全远程访问客户端。 Citrix Secure Access Client 26.6.1.20之前版本存在缓冲区错误漏洞，该漏洞源于存在越界读取问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Citrix Citrix Secure Access Client for Windows 0 ~ 26.6.1.20 -

II. Public POCs for CVE-2026-53566

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III. Intelligence Information for CVE-2026-53566

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Vendor Advisories for CVE-2026-53566 (1)

IV. Related Vulnerabilities

Same product: Citrix Secure Access Client for Windows
Same vendor: Citrix
Same weakness: CWE-125

V. Comments for CVE-2026-53566

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