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CVE-2026-4256— LDAP Injection in PEAKUP's PassGate

Quick assessment

Affected
PEAKUP Technology Inc. PassGate
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.

PEAKUP PassGate是PEAKUP公司的一款服务器设备的访问管理产品。 PEAKUP PassGate 30042026及之前版本存在输入验证错误漏洞，该漏洞源于LDAP查询中特殊元素中和不当，可能导致LDAP注入攻击。

CVSS 8.2 · High EPSS 0.35% · P27

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
PEAKUP Technology Inc. PassGate ≤ 30042026 affected
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I. Basic Information for CVE-2026-4256

Vulnerability Information
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Vulnerability Title
LDAP Injection in PEAKUP's PassGate
Source: CVE Program / CVE List V5
Vulnerability Description
Improper neutralization of special elements used in an LDAP query ('LDAP injection') vulnerability in PEAKUP Technology Inc. PassGate allows LDAP Injection. This issue affects PassGate: through 30042026.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
LDAP查询中使用的特殊元素转义处理不恰当(LDAP注入)
Source: CVE Program / CVE List V5
Vulnerability Title
PEAKUP PassGate 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PEAKUP PassGate是PEAKUP公司的一款服务器设备的访问管理产品。 PEAKUP PassGate 30042026及之前版本存在输入验证错误漏洞，该漏洞源于LDAP查询中特殊元素中和不当，可能导致LDAP注入攻击。
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
PEAKUP Technology Inc. PassGate 0 ~ 30042026 -

II. Public POCs for CVE-2026-4256

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III. Intelligence Information for CVE-2026-4256

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Vendor Advisories for CVE-2026-4256 (1)

IV. Related Vulnerabilities

Same weakness: CWE-90

V. Comments for CVE-2026-4256

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