# CVE-2026-90823: Memory corruption in IPVPN

> Unauthenticated remote attackers can execute arbitrary code as root via a stack buffer overflow in the management interface, which requires manual enablement.

- **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:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Sep 2026
- **Updated:** 17 Sep 2026
- **Also known as:** GHSA-32q2-w7qg-44p8

## What is CVE-2026-90823?

CVE-2026-90823 is a critical memory corruption vulnerability in FatPipe Networks IPVPN, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

FatPipe MPVPN, WARP, and IPVPN appliances running the end-of-life firmware version 10.1.2r60p100 contain a stack-based buffer overflow in /usr/sbin/auth_user_pass. An unauthenticated remote attacker with access to the affected management interface can submit a crafted authentication request that reaches an unchecked copy into a fixed-size stack buffer, potentially allowing arbitrary code execution as root.

The affected management interface is disabled by default and must be affirmatively enabled by the customer before the endpoint becomes reachable. FatPipe recommends restricting management access to trusted administrative networks and using WAN access control lists to limit access to trusted sources.

Customers running the affected end-of-life firmware can contact FatPipe Support for help confirming their firmware version and upgrading to a current supported release at https://www.fatpipeinc.com/support/support, support@fatpipeinc.com, or +1 800-724-8521 (option 3).

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

## Which versions are affected by CVE-2026-90823?


## How do I fix CVE-2026-90823?

No fix has been published for CVE-2026-90823 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-90823 being exploited?

There is no known exploitation of CVE-2026-90823 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-90823 and fix it if it is affected.

What it is: CVE-2026-90823 is a critical memory corruption vulnerability in FatPipe Networks IPVPN, published on 17 Sep 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-2026-90823 in the wild and no public exploit code.

Affected product: FatPipe Networks IPVPN. 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-2026-90823/ (Markdown: https://insights.sbomify.com/CVE-2026-90823/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-90823
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-90823
- OSV: https://osv.dev/vulnerability/CVE-2026-90823

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-90823/
Summaries are generated and may contain mistakes; the official description above is the record.