How severe is CVE-2024-23744?

CVE-2024-23744 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-23744 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-23744?

CVE-2024-23744 affects Trustedfirmware Mbed Tls. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-23744?

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

Does CVE-2024-23744 have an EU (EUVD) identifier?

Yes. CVE-2024-23744 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-21200.

When was CVE-2024-23744 published?

CVE-2024-23744 was published on 2024-01-21 and last updated on 2026-06-17.

CVE-2024-23744

CVE-2024-23744 is a high-severity vulnerability in Trustedfirmware Mbed Tls with a CVSS 3.x base score of 7.5. 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-21200
Weakness: CWE-400
Affected product: Trustedfirmware Mbed Tls
Published: 2024-01-21
Last modified: 2026-06-17

Description

An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.

Frequently asked questions

What is CVE-2024-23744?: An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.
How severe is CVE-2024-23744?: CVE-2024-23744 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-23744 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-23744?: CVE-2024-23744 affects Trustedfirmware Mbed Tls. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-23744?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-23744 have an EU (EUVD) identifier?: Yes. CVE-2024-23744 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-21200.
When was CVE-2024-23744 published?: CVE-2024-23744 was published on 2024-01-21 and last updated on 2026-06-17.

References

https://github.com/Mbed-TLS/mbedtls/issues/8694

Affected products (1)

cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:*

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