What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.8 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-12 · updated 2026-07-14
• Weakness: CWE-121

Description

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.

Affected products

• TinyOS: through 2.1.2

References

• https://github.com/tinyos/tinyos-main
• https://seclists.org/fulldisclosure/2026/Jan/14
• https://www.vulncheck.com/advisories/tinyos-stack-based-buffer-overflow-in-mcp2200gpio

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