by Kastro
Paper/Archive/CVE-2026-26213

CVE-2026-26213

themactep thingino-firmware — thingino-firmware api.cgi Unauthenticated Command Injection in Captive Portal

EPSS 5%CVSS 9.8
critical.is priorityof 100
48
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 91.8.918 × 2018.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
thingino-firmware≤ firmware-2026-03-16–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)8.7CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/themactep/thingino-firmware/releases/tag/firmware-2026-03-15writeupvulncheck.com/advisories/thingino-firmware-api-cgi-unauthenticated-command-injection-in-captive-portal