# CVE-2026-31255

> Vulnerability · severity: **CRITICAL** (CVSS 9.8).

## Description

A command injection vulnerability exists in Tenda AC18 V15.03.05.05_multi. The vulnerability is located in the /goform/SetSambaCfg interface, where improper handling of the guestuser parameter allows attackers to execute arbitrary system commands.

## Key facts

- **CVE ID:** CVE-2026-31255
- **Published:** 2026-04-27
- **CVSS severity:** CRITICAL
- **CVSS base score:** 9.8
- **CWE codes:** CWE-77, CWE-77

## Affected products

- `tenda:ac18_firmware`
- `tenda:ac18`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-31255

## Citation

> AI Analytics. CVE-2026-31255. Retrieved 2026-07-24 from https://api.ai-analytics.org/cve/CVE-2026-31255. Derived from NIST NVD. Licensed CC0.

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