TOTOLINK X18 cstecgi.cgi setMtknatCfg os command injection
TOTOLINK · X18
The TOTOLINK X18 router firmware has an OS command injection flaw in the setMtknatCfg function of the /cgi-bin/cstecgi.cgi component, triggered by manipulating the mtkhnatEnable argument. An attacker with network access and low-privilege authenticated access to the device can inject operating system commands through that argument, with no user interaction required.
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.
- Exploited
- Yes, in VulnCheck KEV
- Reports
- 0
- Tactics
- 0/15
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited 7 months after disclosure.
- Disclosedday 0
- First seen exploitedVulnCheck KEV evidence+7 mo
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
No techniques linkedNo ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.
What security researchers reported
Not named in any threat report yetAlso mentioned in 10 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
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- Hybrid Managed Service Actor / provisioned insider8 Feb 2026
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- zero trust8 Feb 2026
- RondoDox | Guest System attacking | EuroTarget16 Jan 2026
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- 4 more on OTX