Is CVE-2019-15651 actively exploited?

No active exploitation of CVE-2019-15651 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-15651 be exploited remotely?

Yes. CVE-2019-15651 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-15651?

CVE-2019-15651 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2019-15651

CRITICAL

CVE-2019-15651

CWE-125Published: August 26, 2019· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

wolfSSL 4.1.0 has a one-byte heap-based buffer over-read in DecodeCertExtensions in wolfcrypt/src/asn.c because reading the ASN_BOOLEAN byte is mishandled for a crafted DER certificate in GetLength_ex.

NVD Source

Technical Analysis

CVE-2019-15651 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.