# CVE-2026-54124: Windows Terminal Remote Code Execution Vulnerability

> An integer overflow in Windows Terminal allows an unauthorized attacker to execute code locally on affected Windows systems.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 14 Jul 2026
- **Updated:** 28 Oct 2026
- **Also known as:** GHSA-4895-4gj9-m7gc

## What is CVE-2026-54124?

CVE-2026-54124 is a high-severity vulnerability in Microsoft Windows 10 21h2, published on 14 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Integer overflow or wraparound in Windows Terminal allows an unauthorized attacker to execute code locally.

Weakness: CWE-190 (Integer Overflow or Wraparound), CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2026-54124?

It affects 8 products.


Products: Microsoft Terminal, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1, Microsoft Windows Server 2022, Microsoft Windows Server 2025.

## How do I fix CVE-2026-54124?

No fix has been published for CVE-2026-54124 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-54124 being exploited?

There is no known exploitation of CVE-2026-54124 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Windows 10 21h2

- [CVE-2022-44702](https://insights.sbomify.com/CVE-2022-44702/): Windows Terminal Remote Code Execution Vulnerability (high 7.8)
- [CVE-2026-59117](https://insights.sbomify.com/CVE-2026-59117/): Windows Terminal Remote Code Execution Vulnerability (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-54124 and fix it if it is affected.

What it is: CVE-2026-54124 is a high-severity vulnerability in Microsoft Windows 10 21h2, published on 14 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-54124 in the wild and no public exploit code.

Affected product: Microsoft Windows 10 21h2. 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-2026-54124/ (Markdown: https://insights.sbomify.com/CVE-2026-54124/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-54124
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-54124
- OSV: https://osv.dev/vulnerability/CVE-2026-54124

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-54124/
Summaries are generated and may contain mistakes; the official description above is the record.