# CVE-2026-24349: Information disclosure in SIMATIC WinCC Unified PC Runtime V16

> An attacker can extract sensitive key material from the WinCC Certificate Manager due to insufficient protection, leading to information disclosure.

- **Severity:** High 8.2 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jun 2026
- **Updated:** 9 Jun 2026
- **Also known as:** GHSA-vxrh-p77g-j346

## What is CVE-2026-24349?

CVE-2026-24349 is a high-severity vulnerability in Siemens SIMATIC WinCC Unified PC Runtime V16, published on 9 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability has been identified in SIMATIC WinCC Unified PC Runtime V16 (All versions), SIMATIC WinCC Unified PC Runtime V17 (All versions), SIMATIC WinCC Unified PC Runtime V18 (All versions), SIMATIC WinCC Unified PC Runtime V19 (All versions), SIMATIC WinCC Unified PC Runtime V20 (All versions), SIMATIC WinCC Unified PC Runtime V21 (All versions < V21 Update 2). Insufficient protection of key material in WinCC Certificate Manager that could allow an attacker to extract sensitive information.

Weakness: CWE-313 (Cleartext Storage in a File or on Disk)

## Which versions are affected by CVE-2026-24349?

It affects 1 product.


Products: Siemens Simatic Wincc Unified Pc Runtime.

## How do I fix CVE-2026-24349?

No fix has been published for CVE-2026-24349 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-24349 being exploited?

There is no known exploitation of CVE-2026-24349 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-24349 and fix it if it is affected.

What it is: CVE-2026-24349 is a high-severity vulnerability in Siemens SIMATIC WinCC Unified PC Runtime V16, published on 9 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-2026-24349 in the wild and no public exploit code.

Affected product: Siemens SIMATIC WinCC Unified PC Runtime V16. 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-2026-24349/ (Markdown: https://insights.sbomify.com/CVE-2026-24349/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-24349
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-24349
- OSV: https://osv.dev/vulnerability/CVE-2026-24349

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-24349/
Summaries are generated and may contain mistakes; the official description above is the record.