What’s Vulnerable › Vulnerabilities

CVE-2019-16748

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-09-24 · updated 2026-06-17
• Weakness: CWE-125

Description

In wolfSSL through 4.1.0, there is a missing sanity check of memory accesses in parsing ASN.1 certificate data while handshaking. Specifically, there is a one-byte heap-based buffer over-read in CheckCertSignature_ex in wolfcrypt/src/asn.c.

Affected products

• wolfSSL: through 4.1.0

References

• https://github.com/wolfSSL/wolfssl/issues/2459
• https://github.com/wolfSSL/wolfssl/issues/2459

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