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CVE-2026-13742— Lack of signature verification before execution of downloaded content

Quick assessment

Affected
Honeywell Technologies IQ MultiAccess
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.

Honeywell IQ MultiAccess是美国Honeywell公司的一款混合式控制器的门禁系统。 Honeywell IQ MultiAccess 28及之前版本存在竞争条件问题漏洞，该漏洞源于数字签名验证不当，可能导致攻击者用恶意文件替换下载的文件。

CVSS 5.9 · Medium EPSS 0.12% · P2

Affected Version Matrix 1

VendorProduct Version RangeStatus
Honeywell Technologies IQ MultiAccess IQ.v27≤ 28 affected
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I. Basic Information for CVE-2026-13742

Vulnerability Information
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Vulnerability Title
Lack of signature verification before execution of downloaded content
Source: CVE Program / CVE List V5
Vulnerability Description
Honeywell IQ MultiAccess, all versions prior to and including version 28, contain an improper digital signature verification vulnerability. An attacker could potentially exploit this vulnerability, leading to the replacement of downloaded file with a malicious one. Honeywell also recommends updating to the most recent version of this product, service, or offering [V27 SP1, V28 SP1]
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Vulnerability Title
Honeywell IQ MultiAccess 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Honeywell IQ MultiAccess是美国Honeywell公司的一款混合式控制器的门禁系统。 Honeywell IQ MultiAccess 28及之前版本存在竞争条件问题漏洞，该漏洞源于数字签名验证不当，可能导致攻击者用恶意文件替换下载的文件。
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
Honeywell Technologies IQ MultiAccess IQ.v27 ~ 28 -

II. Public POCs for CVE-2026-13742

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III. Intelligence Information for CVE-2026-13742

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Vendor Pages for CVE-2026-13742 (1)

IV. Related Vulnerabilities

Same weakness: CWE-367