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CVE-2026-40434— Anviz CrossChex Standard Improper Verification of Source of a Communication Channel

Quick assessment

Affected
Anviz Anviz CrossChex Standard
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.

Anviz CrossChex Standard是美国Anviz公司的一款用于门禁与考勤数据管理的集中控制软件。 Anviz CrossChex Standard存在安全漏洞，该漏洞源于客户端/服务器通道缺少源验证，可能导致同一网络上的攻击者注入TCP数据包以更改或中断应用程序流量。

CVSS 8.1 · High EPSS 0.23% · P14

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2026-40434

Vulnerability Information
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Vulnerability Title
Anviz CrossChex Standard Improper Verification of Source of a Communication Channel
Source: CVE Program / CVE List V5
Vulnerability Description
Anviz CrossChex Standard lacks source verification in the client/server channel, enabling TCP packet injection by an attacker on the same network to alter or disrupt application traffic.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
通信信道源的不正确验证
Source: CVE Program / CVE List V5
Vulnerability Title
Anviz CrossChex Standard 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Anviz CrossChex Standard是美国Anviz公司的一款用于门禁与考勤数据管理的集中控制软件。 Anviz CrossChex Standard存在安全漏洞，该漏洞源于客户端/服务器通道缺少源验证，可能导致同一网络上的攻击者注入TCP数据包以更改或中断应用程序流量。
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
Anviz Anviz CrossChex Standard All versions -

II. Public POCs for CVE-2026-40434

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III. Intelligence Information for CVE-2026-40434

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Vendor Advisories for CVE-2026-40434 (1)

Same Patch Batch · Anviz · 2026-04-17 · 12 CVEs total

CVE-2026-35546 9.8 CRITICAL Anviz Products Missing Authentication for Critical Function
CVE-2026-35682 8.8 HIGH Anviz CX2 Lite Command Injection
CVE-2026-40066 8.8 HIGH Anviz Products Download of Code Without Integrity Check
CVE-2026-32324 7.7 HIGH Anviz CX7 Firmware Use of Hard-coded Cryptographic Key
CVE-2026-32650 7.5 HIGH Anviz CrossChex Standard Algorithm Downgrade
CVE-2026-40461 7.5 HIGH Anviz Products Missing Authentication for Critical Function
CVE-2026-33569 6.5 MEDIUM Anviz Products Cleartext Transmission of Sensitive Information
CVE-2026-35061 5.3 MEDIUM Anviz Products Missing Authorization
CVE-2026-32648 5.3 MEDIUM Anviz Products Missing Authorization
CVE-2026-33093 5.3 MEDIUM Anviz Products Missing Authorization
CVE-2026-31927 4.9 MEDIUM Anviz CX7 Firmware Relative Path Traversal

IV. Related Vulnerabilities

Same product: Anviz CrossChex Standard
Same vendor: Anviz
Same weakness: CWE-940

V. Comments for CVE-2026-40434

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