CVE-2026-0401 Null dereference in SonicOS
Medium 4.9
Published
Updated
Check this codebase for CVE-2026-0401 and fix it if it is affected.
What it is: CVE-2026-0401 is a medium-severity vulnerability in Sonicwall Sonicos, published on 24 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-0401 in the wild and no public exploit code.
Affected product: Sonicwall Sonicos. 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-2026-0401/ (Markdown: https://insights.sbomify.com/CVE-2026-0401/index.md)
A remote authenticated attacker can crash a SonicWall firewall via a NULL pointer dereference in SonicOS.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-0401?
CVE-2026-0401 is a medium-severity vulnerability in Sonicwall Sonicos, published on 24 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A post-authentication NULL Pointer Dereference vulnerability in SonicOS allows a remote attacker to crash a firewall.
Weakness: CWE-476
Which versions are affected by CVE-2026-0401?
It affects 1 product.
Products include Sonicwall Sonicos.
How do I fix CVE-2026-0401?
No fix has been published for CVE-2026-0401 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-0401 being exploited?
There is no known exploitation of CVE-2026-0401 in the wild and no public exploit code.
Other vulnerabilities in Sonicwall Sonicos
Sources
Also known as GHSA-xqx8-2c6c-9g3g.