How severe is CVE-2026-22212?

CVE-2026-22212 has a CVSS 4.0 base score of 4.8, rated medium severity.

Is CVE-2026-22212 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-22212?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-22212 have an EU (EUVD) identifier?

Yes. CVE-2026-22212 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2398.

When was CVE-2026-22212 published?

CVE-2026-22212 was published on 2026-01-12 and last updated on 2026-06-17.

CVE-2026-22212

CVE-2026-22212 is a medium-severity vulnerability with a CVSS 4.0 base score of 4.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-121.

Key facts

Severity: Medium (CVSS 4.0 base score 4.8)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2398
Weakness: CWE-121
Published: 2026-01-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-22212?: 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.
How severe is CVE-2026-22212?: CVE-2026-22212 has a CVSS 4.0 base score of 4.8, rated medium severity.
Is CVE-2026-22212 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-22212?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-22212 have an EU (EUVD) identifier?: Yes. CVE-2026-22212 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2398.
When was CVE-2026-22212 published?: CVE-2026-22212 was published on 2026-01-12 and last updated on 2026-06-17.

References

Other CWE-121 (Stack-based Buffer Overflow) vulnerabilities

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