# CVE-2021-20028: SonicWall Secure Remote Access (SRA) SQL Injection

> SQL injection in SonicWall SRA appliances allows attackers to read or modify data, affecting end-of-life products.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 28 Mar 2022 (CISA KEV), used in ransomware
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Aug 2021
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-2gf8-x72h-g57r

## What is CVE-2021-20028?

CVE-2021-20028 is a critical SQL injection vulnerability in SonicWall SRA/SMA100, published on 4 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Improper neutralization of a SQL Command leading to SQL Injection vulnerability impacting end-of-life Secure Remote Access (SRA) products, specifically the SRA appliances running all 8.x firmware and 9.0.0.9-26sv or earlier

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2021-20028?

It affects 6 products.


Products: Sonicwall Sma 210 Firmware, Sonicwall Sma 410 Firmware, Sonicwall Sma 500v Firmware, Sonicwall Sra 1600 Firmware, Sonicwall Sra 4600 Firmware, Sonicwall Sra Va Firmware.

## How do I fix CVE-2021-20028?

No fix has been published for CVE-2021-20028 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 18 Apr 2022.

## Is CVE-2021-20028 being exploited?

Yes. Attackers have exploited CVE-2021-20028 in the wild since at least 28 Mar 2022, including in ransomware campaigns.

## Other vulnerabilities in SonicWall SRA/SMA100

- [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-2025-40596](https://insights.sbomify.com/CVE-2025-40596/): Memory corruption in SMA 100 Series (high 7.3)
- [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-2021-20028 and fix it if it is affected.

What it is: CVE-2021-20028 is a critical SQL injection vulnerability in SonicWall SRA/SMA100, published on 4 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2021-20028 in the wild since at least 28 Mar 2022, including in ransomware campaigns.

Affected product: SonicWall SRA/SMA100. 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-2021-20028/ (Markdown: https://insights.sbomify.com/CVE-2021-20028/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-20028
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-20028
- OSV: https://osv.dev/vulnerability/CVE-2021-20028

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-20028/
Summaries are generated and may contain mistakes; the official description above is the record.