How severe is CVE-2024-39223?

CVE-2024-39223 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-2024-39223 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2024-39223?

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-2024-39223 have an EU (EUVD) identifier?

Yes. CVE-2024-39223 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2306.

When was CVE-2024-39223 published?

CVE-2024-39223 was published on 2024-07-03 and last updated on 2026-06-17.

CVE-2024-39223

CVE-2024-39223 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-639.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-2306
Weakness: CWE-639
Published: 2024-07-03
Last modified: 2026-06-17

Description

An authentication bypass in the SSH service of gost v2.11.5 allows attackers to intercept communications via setting the HostKeyCallback function to ssh.InsecureIgnoreHostKey

Frequently asked questions

What is CVE-2024-39223?: An authentication bypass in the SSH service of gost v2.11.5 allows attackers to intercept communications via setting the HostKeyCallback function to ssh.InsecureIgnoreHostKey
How severe is CVE-2024-39223?: CVE-2024-39223 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-2024-39223 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2024-39223?: 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-2024-39223 have an EU (EUVD) identifier?: Yes. CVE-2024-39223 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2306.
When was CVE-2024-39223 published?: CVE-2024-39223 was published on 2024-07-03 and last updated on 2026-06-17.

References

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