CVE-2026-22212CWE-121

TinyOS <= 2.1.2 Stack-Based Buffer Overflow in mcp2200gpio

Medium · published January 12, 2026

CVSS v4.0
4.8
EPSS
0%
Percentile
3.0
In the wild
Unconfirmed
What it is

TinyOS versions up to and including 2.1.2 contain a stack-based buffer overflow vulnerability in the mcp2200gpio utility. The vulnerability is caused by unsafe use of strcpy() and strcat() functions when constructing device paths during automatic device discovery. A local attacker can exploit this by creating specially crafted filenames under /dev/usb/, leading to stack memory corruption and application crashes.

The record
Technical detail
CVSS v4.0
4.8 · MEDIUM
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00140 · 3.0th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-01-12T23:02Z
EPSS history
Timeline
  • 12 JAN 23:02Z
    TinyOS <= 2.1.2 Stack-Based Buffer Overflow in mcp2200gpio
    cvelistv5