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Vulnerability record · CVE-2021-37155 · published 21 July 2021

CVE-2021-37155: Wolfssl vulnerability

Wolfssl · Wolfssl

wolfSSL 4.6.x through 4.7.x before 4.8.0 does not produce a failure outcome when the serial number in an OCSP request differs from the serial number in the OCSP response.

9.8 CVSS 3.1 Critical EPSS 1.5% · top 26.9%
9.8CVSS 3.1 base score, v2 7.5
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

wolfSSL 4.6.x through 4.7.x before 4.8.0 does not produce a failure outcome when the serial number in an OCSP request differs from the serial number in the OCSP response.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/wolfSSL/wolfssl/pull/3990 PatchThird Party Advisory
https://github.com/wolfSSL/wolfssl/releases/tag/v4.8.0-stable Release NotesThird Party Advisory
https://github.com/wolfSSL/wolfssl/pull/3990 PatchThird Party Advisory
https://github.com/wolfSSL/wolfssl/releases/tag/v4.8.0-stable Release NotesThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2024-5991Wolfssl out-of-bounds read vulnerabilityIn function MatchDomainName(), input param str is treated as a NULL terminated string despite being user provided and unchecked. Specifically, the fu…EPSS 0.56%9.8CVE-2020-36177Wolfssl out-of-bounds write vulnerabilityRsaPad_PSS in wolfcrypt/src/rsa.c in wolfSSL before 4.6.0 has an out-of-bounds write for certain relationships between key size and digest size.EPSS 3.5%9.8CVE-2014-2898Wolfssl out-of-bounds read vulnerabilitywolfSSL CyaSSL before 2.9.4 allows remote attackers to have unspecified impact via multiple calls to the CyaSSL_read function which triggers an out-o…EPSS 2.8%9.8CVE-2014-2896Wolfssl out-of-bounds read vulnerabilityThe DoAlert function in the (1) TLS and (2) DTLS implementations in wolfSSL CyaSSL before 2.9.4 allows remote attackers to have unspecified impact an…EPSS 2.8%9.8CVE-2014-2897Wolfssl out-of-bounds read vulnerabilityThe SSL 3 HMAC functionality in wolfSSL CyaSSL 2.5.0 before 2.9.4 does not check the padding length when verification fails, which allows remote atta…EPSS 2.8%9.8CVE-2019-16748Wolfssl out-of-bounds read vulnerabilityIn wolfSSL through 4.1.0, there is a missing sanity check of memory accesses in parsing ASN.1 certificate data while handshaking. Specifically, there…EPSS 1.2%9.8CVE-2019-15651Wolfssl out-of-bounds read vulnerabilitywolfSSL 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 misha…EPSS 1.0%9.8CVE-2019-11873Wolfssl out-of-bounds write vulnerabilitywolfSSL 4.0.0 has a Buffer Overflow in DoPreSharedKeys in tls13.c when a current identity size is greater than a client identity size. An attacker se…EPSS 8.8%

Source: NIST National Vulnerability Database (record CVE-2021-37155), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.