Medium 4.8Published Jan 12, 2026

CVE-2026-22212TinyOS <= 2.1.2 Stack-Based Buffer Overflow in mcp2200gpio

Updated under an hour ago (Oct 27, 2026, 8:00 AM ET)

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Exploited in the last 30 days

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.

CVSS: 4.8 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-121
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

TinyOS TinyOS tinyos:tinyos (from the name)	through 2.1.2	CNA record

References

References

https://seclists.org/fulldisclosure/2026/Jan/14	technical-description, exploit
https://github.com/tinyos/tinyos-main	product
https://www.vulncheck.com/advisories/tinyos-stack-based-buffer-overflow-in-mcp2200gpio	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.