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

> Attackers can replace downloaded files with malicious ones due to missing signature verification, leading to code execution on Honeywell IQ MultiAccess systems.

- **Severity:** Medium 5.9 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Jun 2026
- **Updated:** 27 Sep 2026
- **Also known as:** GHSA-93h9-2372-g58v

## What is CVE-2026-13742?

CVE-2026-13742 is a medium-severity code injection vulnerability in Honeywell Technologies IQ MultiAccess, published on 29 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official 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]

Weakness: CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition)

## Which versions are affected by CVE-2026-13742?


## How do I fix CVE-2026-13742?

No fix has been published for CVE-2026-13742 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-13742 being exploited?

There is no known exploitation of CVE-2026-13742 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-13742 and fix it if it is affected.

What it is: CVE-2026-13742 is a medium-severity code injection vulnerability in Honeywell Technologies IQ MultiAccess, published on 29 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-13742 in the wild and no public exploit code.

Affected product: Honeywell Technologies IQ MultiAccess. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-13742/ (Markdown: https://insights.sbomify.com/CVE-2026-13742/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-13742
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-13742
- OSV: https://osv.dev/vulnerability/CVE-2026-13742

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-13742/
Summaries are generated and may contain mistakes; the official description above is the record.