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CVE-2018-0487

33
FAUCET Score

CVE-2018-0487 is a critical buffer overflow vulnerability in ARM mbed TLS versions prior to 1.3.22, 2.1.10, and 2.7.0, affecting ARM and Debian Linux distributions. This flaw allows remote attackers to execute arbitrary code or cause a denial of service by sending a specially crafted certificate chain during TLS or DTLS sessions, which is mishandled during RSASSA-PSS signature verification. With a CVSS score of 9.8 (Critical), it presents a high-impact, low-complexity attack vector requiring no user interaction or privileges. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.3.8, < 1.3.22CPE matchmatch criteria
cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
>= 2.1.0, < 2.1.10CPE matchmatch criteria
cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
>= 2.2.0, < 2.7.0CPE matchmatch criteria
cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.26%
Probability of exploitation in next 30 days
EPSS Percentile
87.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0326 is in the 79th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

security.gentoo.org / glsa/201804-19
Third Party Advisory
tls.mbed.org / tech-updates/security-advisories/mbedtls-security-advisory-2018-01
MitigationVendor Advisory
usn.ubuntu.com / 4267-1
debian.org / security/2018/dsa-4138
Third Party Advisory
debian.org / security/2018/dsa-4147
Third Party Advisory
securityfocus.com / bid/103056
Third Party AdvisoryVDB Entry