CVE-2026-105726 Microsoft Defender Information Disclosure Vulnerability
Medium 5.5
Published
Updated
Check this codebase for CVE-2026-105726 and fix it if it is affected.
What it is: CVE-2026-105726 is a medium-severity vulnerability in Microsoft Defender for Endpoint for Windows, published on 13 Oct 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-2026-105726 in the wild and no public exploit code.
Affected product: Microsoft Defender for Endpoint for Windows. 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-2026-105726/ (Markdown: https://insights.sbomify.com/CVE-2026-105726/index.md)
An authorized local attacker can exploit an out-of-bounds read in Microsoft Defender to disclose sensitive information.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-105726?
CVE-2026-105726 is a medium-severity vulnerability in Microsoft Defender for Endpoint for Windows, published on 13 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Out-of-bounds read in Microsoft Defender allows an authorized attacker to disclose information locally.
Weakness: CWE-125
Which versions are affected by CVE-2026-105726?
How do I fix CVE-2026-105726?
No fix has been published for CVE-2026-105726 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-105726 being exploited?
There is no known exploitation of CVE-2026-105726 in the wild and no public exploit code.
Sources
Also known as GHSA-v277-2c6x-cp2w.