PT-2026-2321 · Tinyos · Tinyos

Ron Edgerson · Published 2026-01-12 · Updated 2026-01-12 · CVE-2026-22212

Positive Technologies (AI Summary)

CVSS v4.0

4.8

Medium

Base vector

AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions TinyOS versions up to and including 2.1.2

Description TinyOS versions up to and including 2.1.2 have a stack-based buffer overflow issue in the mcp2200gpio utility. This is due to the unsafe use of strcpy() and strcat() functions when creating device paths during automatic device discovery. A local attacker can exploit this by creating specially crafted filenames under the /dev/usb/ directory, which can cause stack memory corruption and application crashes.

Recommendations Update TinyOS to a version later than 2.1.2.

Exploit

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2026-22212

Affected Products

Tinyos

References · 6

• 🔥 https://seclists.org/fulldisclosure/2026/Jan/14 · Exploit
• https://osv.dev/vulnerability/CVE-2026-22212 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22212 · Security Note
• https://github.com/tinyos/tinyos-main · Note
• https://twitter.com/CVEnew/status/2010859150432219624 · Twitter Post
• https://vulncheck.com/advisories/tinyos-stack-based-buffer-overflow-in-mcp2200gpio · Note