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CVE-2026-27790

Quick assessment

Affected
Gallagher T-20 Readers
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.

Gallagher T-20 Readers是新西兰Gallagher公司的一款门禁系统读取器。 Gallagher T-20 Readers存在异常处理不当漏洞，该漏洞源于未捕获异常问题，可能导致经过身份验证和授权的操作员通过发送特定请求触发重启，造成临时拒绝服务。以下版本受到影响：9.50之前版本、9.40之前版本、9.30之前版本、9.20之前版本和9.10及之前版本。

CVSS 2.7 · Low EPSS 0.39% · P31

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 5

VendorProduct Version RangeStatus
Gallagher T-20 Readers ≤ 9.10 affected
9.50< vCR9.50.260616a affected
9.40< vCR9.40.260616a affected
9.30< vCR9.30.260616a affected
9.20< vCR9.20.260616a affected
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I. Basic Information for CVE-2026-27790

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Uncaught Exception (CWE-248) in the T20 Readers allows an authenticated and authorized operator to trigger a restart by sending specific requests, resulting in a temporary denial of service. Version of Command Centre affected: * 9.50 prior to vCR9.50.260616a (distributed in 9.50.1587(MR1)) * 9.40 prior to vCR9.40.260616a (distributed in 9.40.3130(MR3)) * 9.30 prior to vCR9.30.260616a (distributed in 9.30.3983(MR5)) * 9.20 prior to vCR9.20.260616a (distributed in 9.20.4349(MR7)) * all versions of 9.10 and prior.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5
Vulnerability Title
Gallagher T-20 Readers 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gallagher T-20 Readers是新西兰Gallagher公司的一款门禁系统读取器。 Gallagher T-20 Readers存在异常处理不当漏洞，该漏洞源于未捕获异常问题，可能导致经过身份验证和授权的操作员通过发送特定请求触发重启，造成临时拒绝服务。以下版本受到影响：9.50之前版本、9.40之前版本、9.30之前版本、9.20之前版本和9.10及之前版本。
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
Gallagher T-20 Readers 0 ~ 9.10 -

II. Public POCs for CVE-2026-27790

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III. Intelligence Information for CVE-2026-27790

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Vendor Advisories for CVE-2026-27790 (1)

Same Patch Batch · Gallagher · 2026-07-07 · 3 CVEs total

CVE-2026-26053 5.3 MEDIUM Gallagher Command Centre Server 权限许可和访问控制问题漏洞
CVE-2026-27844 2.7 LOW Gallagher controller 6000 异常处理不当漏洞

IV. Related Vulnerabilities

Same vendor: Gallagher
Same weakness: CWE-248

V. Comments for CVE-2026-27790

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