CVE-2025-1829: TOTOLINK X18 cstecgi.cgi setMtknatCfg os command injection

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of 29 Oct 2026.

VulnCheck KEV lists it since 9 Oct 2025. It cites 2 public reports, the first from 9 Oct 2025.

• trendmicro.com
• beelzebub.ai

How likely is exploitation in the next 30 days?

12.4%

EPSS score, percentile 96.2 of all scored records. A probability estimated by FIRST, not a report of exploitation.

CISA's SSVC assessment in the CVE record lists exploitation as poc.

How severe?

5.3 Medium

CVSS v4.0 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

• 9.1.0cu.2024_B20220329

Versions by product

Source: CISA KEV 2026.10.29, as of 29 Oct 2026; VulnCheck KEV, as of 30 Oct 2026; FIRST EPSS, as of 29 Oct 2026; CVE List, as of 30 Oct 2026. About the data.

Description

TOTOLINK X18 cstecgi.cgi setMtknatCfg os command injection

A vulnerability was found in TOTOLINK X18 9.1.0cu.2024_B20220329. It has been declared as critical. This vulnerability affects the function setMtknatCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument mtkhnatEnable leads to os command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Source: CVE List, as of 30 Oct 2026. About the data.

What to do

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

This summary is based on the CVE record as of 30 Oct 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Source: CVE List, as of 30 Oct 2026. About the data.

Timeline