# CVE-2025-40596: Memory corruption in SMA 100 Series

> Remote unauthenticated attackers can cause denial of service or execute code via a stack-based buffer overflow in the SMA 100 web interface.

- **Severity:** High 7.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Jul 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-9c9q-24rh-frhg

## What is CVE-2025-40596?

CVE-2025-40596 is a high-severity memory corruption vulnerability in SonicWall SMA 100 Series, published on 23 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A Stack-based buffer overflow vulnerability in the SMA100 series web interface allows remote, unauthenticated attacker to cause Denial of Service (DoS) or potentially results in code execution.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2025-40596?

It affects 3 products.


Products: Sonicwall Sma 210 Firmware, Sonicwall Sma 410 Firmware, Sonicwall Sma 500v Firmware.

## How do I fix CVE-2025-40596?

No fix has been published for CVE-2025-40596 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-40596 being exploited?

There is no known exploitation of CVE-2025-40596 in the wild and no public exploit code.

## Other vulnerabilities in SonicWall SMA 100 Series

- [CVE-2021-20028](https://insights.sbomify.com/CVE-2021-20028/): SonicWall Secure Remote Access (SRA) SQL Injection (critical 9.8, exploited in the wild)
- [CVE-2025-40599](https://insights.sbomify.com/CVE-2025-40599/): File upload in SMA 100 Series (critical 9.1)
- [CVE-2022-1703](https://insights.sbomify.com/CVE-2022-1703/): Command injection in SMA100 (high 8.8)
- [CVE-2025-40597](https://insights.sbomify.com/CVE-2025-40597/): Memory corruption in SMA 100 Series (high 7.5)
- [CVE-2025-40598](https://insights.sbomify.com/CVE-2025-40598/): Cross-site scripting in SMA 100 Series (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-40596 and fix it if it is affected.

What it is: CVE-2025-40596 is a high-severity memory corruption vulnerability in SonicWall SMA 100 Series, published on 23 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-40596 in the wild and no public exploit code.

Affected product: SonicWall SMA 100 Series. 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-2025-40596/ (Markdown: https://insights.sbomify.com/CVE-2025-40596/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-40596
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-40596
- OSV: https://osv.dev/vulnerability/CVE-2025-40596

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-40596/
Summaries are generated and may contain mistakes; the official description above is the record.