Is CVE-2024-30166 in the CISA KEV catalog?

No. CVE-2024-30166 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-30166?

CVE-2024-30166 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2024-30166?

CVE-2024-30166 has an EPSS score of 0.73% (50th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-30166?

Upgrade mbed tls to 3.6.0 or later.

CVE & CISA-KEV Catalog

CVE-2024-30166

CRITICAL

9.1

CVSS v3

NVD

Description

In Mbed TLS 3.3.0 through 3.5.2 before 3.6.0, a malicious client can cause information disclosure or a denial of service because of a stack buffer over-read (of less than 256 bytes) in a TLS 1.3 server via a TLS 3.1 ClientHello.

CWE-121Stack-based Buffer Overflow

How to fix

Remediation Available

mbed tlsNVD

Affected:>= 3.3.0, < 3.6.0Fixed in:3.6.0CVE-2024-30166derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Exploit Intelligence

0.73%probability of exploitation in 30 days

50thpercentile

Moderate risk: more likely to be exploited than 50% of all known CVEs.

References

Vendor Advisory1

mbed-tls.readthedocs.io

Release Notes1

github.com

Related Vulnerabilities

Other CWE-121 (Stack-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2009-0927	High	8.8	97%	KEV	Fix
CVE-2020-10924	High	8.8	87%	-	-
CVE-2022-20705	Critical	10.0	80%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-05.