Is CVE-2017-2784 in the CISA KEV catalog?

No. CVE-2017-2784 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-2784?

CVE-2017-2784 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2017-2784?

CVE-2017-2784 has an EPSS score of 3.39% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-2784?

Upgrade mbedtls on debian 11 to 2.4.2-1 or later.

CVE & CISA-KEV Catalog

CVE-2017-2784

HIGHEPSS 87th pctl

8.1

CVSS v3

NVD

Description

An exploitable free of a stack pointer vulnerability exists in the x509 certificate parsing code of ARM mbed TLS before 1.3.19, 2.x before 2.1.7, and 2.4.x before 2.4.2. A specially crafted x509 certificate, when parsed by mbed TLS library, can cause an invalid free of a stack pointer leading to a potential remote code execution. In order to exploit this vulnerability, an attacker can act as either a client or a server on a network to deliver malicious x509 certificates to vulnerable applications.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

mbedtlsDebian

Fixed in:2.4.2-1CVE-2017-2784

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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

3.39%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Exploit1

talosintelligence.com

Vendor Advisory1

tls.mbed.org

Other references1

security.gentoo.org

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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.