CVE WatchJul 14, 2026

CVE-2026-22211

TinyOS versions up to and including 2.1.2 contain a global buffer overflow vulnerability in the printfUART formatted output implementation u

CVSS

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No CVSS

EPSS

0.2%

KEV

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Exploit Today

0-100

Published: Jan 14, 2026 · Last modified: Jul 14, 2026 · CWE-787

EPSS · 30d

0.2%EPSS · 30 days0.2%

2026-06-302026-07-17

Technical description

TinyOS versions up to and including 2.1.2 contain a global buffer overflow vulnerability in the printfUART formatted output implementation used within the ZigBee / IEEE 802.15.4 networking stack. The implementation formats output into a fixed-size global buffer and concatenates strings for %s format specifiers using strcat() without verifying remaining buffer capacity. When printfUART is invoked with a caller-controlled string longer than the available space, the unbounded sprintf/strcat sequence writes past the end of debugbuf, resulting in global memory corruption. This can cause denial of service, unintended behavior, or information disclosure via corrupted adjacent global state or UART output.

Official references

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