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CVE-2017-14032

25
FAUCET Score

CVE-2017-14032 describes a critical vulnerability in ARM mbed TLS versions prior to 1.3.21 and 2.x prior to 2.1.9, specifically when optional authentication is configured. This flaw allows remote attackers to bypass peer authentication by presenting an X.509 certificate chain with an excessive number of intermediate certificates. With a CVSS score of 8.1 (HIGH), this vulnerability has a network attack vector, high complexity, and could lead to high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.3.19CPE matchmatch criteria
cpe:2.3:a:arm:mbed_tls:1.3.19:*:*:*:*:*:*:*
1.3.21CPE matchmatch criteria
cpe:2.3:a:arm:mbed_tls:1.3.21:*:*:*:*:*:*:*
2.1.7CPE matchmatch criteria
cpe:2.3:a:arm:mbed_tls:2.1.7:*:*:*:*:*:*:*
2.1.9CPE matchmatch criteria
cpe:2.3:a:arm:mbed_tls:2.1.9:*:*:*:*:*:*:*
2.4.2CPE matchmatch criteria
cpe:2.3:a:arm:mbed_tls:2.4.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.49%
Probability of exploitation in next 30 days
EPSS Percentile
71.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0149 is in the 29th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

bugs.debian.org / 873557
Issue TrackingPatchThird Party Advisory
github.com / ARMmbed/mbedtls/commit/31458a18788b0cf0b722acda9bb2f2fe13a3fb32
Issue TrackingPatchThird Party Advisory
github.com / ARMmbed/mbedtls/commit/d15795acd5074e0b44e71f7ede8bdfe1b48591fc
Issue TrackingPatchThird Party Advisory
tls.mbed.org / tech-updates/security-advisories/mbedtls-security-advisory-2017-02
Vendor Advisory
debian.org / security/2017/dsa-3967