# CVE-2026-16520: SQL injection in Genian NAC V4.0

> Attackers can exploit SQL injection to bypass authentication and access sensitive data in Genian NAC and ZTNA products.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Aug 2026
- **Updated:** 21 Aug 2026
- **Also known as:** GHSA-78xj-r982-5m2q

## What is CVE-2026-16520?

CVE-2026-16520 is a high-severity SQL injection vulnerability in Genians Genian NAC V4.0, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Improper input validation and Exposure of sensitive information through data queries vulnerability in Genians Genian NAC V4.0, Genians Genian NAC V5.0, and Genians Genian ZTNA V6.0 allows SQL Injection and Authentication Bypass.

This issue affects Genian NAC V4.0: from 4.0.0 before 4.0.175(Revision 150340); 
Genian NAC V5.0: from 5.0.0 before 5.0.65 LTS(Revision 150331), from 5.0.0 before 5.0.75 LTS(Revision 150330), from 5.0.0 before 5.0.87 Release Stable(Revision 150329), and from 5.0.0 before 5.0.88(Revision 150328); 
Genian ZTNA V6.0: from 6.0.0 before 6.0.26 LTS(Revision 150337), from 6.0.0 before 6.0.35 LTS(Revision 150336), from 6.0.0 before 6.0.47 Release Stable(Revision 150334), and from 6.0.0 before 6.0.48(Revision 150333).

Weakness: CWE-202 (Exposure of Sensitive Information Through Data Queries), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-16520?


## How do I fix CVE-2026-16520?

No fix has been published for CVE-2026-16520 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-16520 being exploited?

There is no known exploitation of CVE-2026-16520 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-16520 and fix it if it is affected.

What it is: CVE-2026-16520 is a high-severity SQL injection vulnerability in Genians Genian NAC V4.0, published on 20 Aug 2026. 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-2026-16520 in the wild and no public exploit code.

Affected product: Genians Genian NAC V4.0. 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-2026-16520/ (Markdown: https://insights.sbomify.com/CVE-2026-16520/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-16520
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16520
- OSV: https://osv.dev/vulnerability/CVE-2026-16520

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-16520/
Summaries are generated and may contain mistakes; the official description above is the record.