How severe is CVE-2026-37539?

CVE-2026-37539 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-37539 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-37539?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-37539 have an EU (EUVD) identifier?

Yes. CVE-2026-37539 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26692.

When was CVE-2026-37539 published?

CVE-2026-37539 was published on 2026-05-01 and last updated on 2026-06-17.

CVE-2026-37539

CVE-2026-37539 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26692
Weakness: CWE-121
Published: 2026-05-01
Last modified: 2026-06-17

Description

Buffer overflow vulnerability in cannelloni v2.0.0 in CAN frame parsing in parser.cpp in function parseCANFrame, and decoder.cpp in function decodeFrame allowing remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via crafted CAN FD frames.

Frequently asked questions

What is CVE-2026-37539?: Buffer overflow vulnerability in cannelloni v2.0.0 in CAN frame parsing in parser.cpp in function parseCANFrame, and decoder.cpp in function decodeFrame allowing remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via crafted CAN FD frames.
How severe is CVE-2026-37539?: CVE-2026-37539 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-37539 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-37539?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-37539 have an EU (EUVD) identifier?: Yes. CVE-2026-37539 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26692.
When was CVE-2026-37539 published?: CVE-2026-37539 was published on 2026-05-01 and last updated on 2026-06-17.

References

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