How severe is CVE-2026-4233?

CVE-2026-4233 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-4233 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-4233?

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

Does CVE-2026-4233 have an EU (EUVD) identifier?

Yes. CVE-2026-4233 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12399.

When was CVE-2026-4233 published?

CVE-2026-4233 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-4233

CVE-2026-4233 is a medium-severity vulnerability with a CVSS 3.x base score of 4.3. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
CVSS v4: 2.1
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12399
Weakness: CWE-22
Published: 2026-03-16
Last modified: 2026-06-17

Description

A vulnerability was identified in ThingsGateway 12. This affects an unknown part of the file /api/file/download. The manipulation of the argument fileName leads to path traversal. Remote exploitation of the attack is possible. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2026-4233?: A vulnerability was identified in ThingsGateway 12. This affects an unknown part of the file /api/file/download. The manipulation of the argument fileName leads to path traversal. Remote exploitation of the attack is possible. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2026-4233?: CVE-2026-4233 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-4233 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-4233?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4233 have an EU (EUVD) identifier?: Yes. CVE-2026-4233 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12399.
When was CVE-2026-4233 published?: CVE-2026-4233 was published on 2026-03-16 and last updated on 2026-06-17.

References

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