What is CVE-2026-26213?

CVE-2026-26213 is a critical-severity vulnerability in Themactep Thingino-Firmware, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-03-26.

How severe is CVE-2026-26213?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Themactep Thingino-Firmware

CVE-2026-26213

thingino-firmware versions up to the firmware-2026-03-16 release contains an unauthenticated os command injection vulnerability in the WiFi captive portal CGI script that allows remote attackers to execute arbitrary commands as root by injecting malicious code through unsanitized HTTP parameter names. Attackers can exploit the eval function in parse_query() and parse_post() functions to achieve remote code execution and perform privileged configuration changes including root password reset and SSH authorized_keys modification, resulting in full persistent device compromise.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.062 (92.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Themactep Thingino-firmware — versions 0
Thingino Thingino_firmware

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

disclosure@vulncheck.com (product, Release Notes)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-26213?: CVE-2026-26213 is a critical-severity vulnerability in Themactep Thingino-Firmware, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-03-26.
How severe is CVE-2026-26213?: Critical severity. CVSS v3 base score is 9.8 out of 10.