# CVE-2026-2192: Tenda AC9 formGetRebootTimer stack-based overflow

> A remote attacker can trigger a stack-based buffer overflow in the Tenda AC9 router's reboot timer function, potentially leading to code execution or service disruption.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Feb 2026
- **Updated:** 23 Feb 2026
- **Also known as:** GHSA-838g-pm36-9pfv

## What is CVE-2026-2192?

CVE-2026-2192 is a high-severity memory corruption vulnerability in Tenda Ac9 Firmware, published on 8 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A security vulnerability has been detected in Tenda AC9 15.03.06.42_multi. Affected by this vulnerability is the function formGetRebootTimer. Such manipulation of the argument sys.schedulereboot.start_time/sys.schedulereboot.end_time leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed publicly and may be used.

Weakness: CWE-121 (Stack-based Buffer Overflow), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-2192?

It affects 1 product.


Products: Tenda Ac9 Firmware.

## How do I fix CVE-2026-2192?

No fix has been published for CVE-2026-2192 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-2192 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2192 exists.

## Other vulnerabilities in Tenda Ac9 Firmware

- [CVE-2025-45042](https://insights.sbomify.com/CVE-2025-45042/): Command injection in n/a (critical 9.8)
- [CVE-2025-44872](https://insights.sbomify.com/CVE-2025-44872/): Command injection in n/a (critical 9.8)
- [CVE-2025-44877](https://insights.sbomify.com/CVE-2025-44877/): Command injection in n/a (critical 9.8)
- [CVE-2025-45427](https://insights.sbomify.com/CVE-2025-45427/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-45428](https://insights.sbomify.com/CVE-2025-45428/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2192 and fix it if it is affected.

What it is: CVE-2026-2192 is a high-severity memory corruption vulnerability in Tenda Ac9 Firmware, published on 8 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2192 exists.

Affected product: Tenda Ac9 Firmware. 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-2026-2192/ (Markdown: https://insights.sbomify.com/CVE-2026-2192/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2192
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2192
- OSV: https://osv.dev/vulnerability/CVE-2026-2192

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-2192/
Summaries are generated and may contain mistakes; the official description above is the record.