CVE-2023-6936
Medium
Published: 20 February 2024
Published
20 February 2024
Modified
26 March 2025
KEV Added
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Patch
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CVSS Score v3.1
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS Score
0.0027
51.1th percentile
Risk Priority
11
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2023-6936 is a medium-severity Out-of-bounds Read (CWE-125) vulnerability in Wolfssl Wolfssl. Its CVSS base score is 5.3 (Medium).
Operationally, ranked in the top 48.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-59134
Vulnerability details
In wolfSSL prior to 5.6.6, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS client or network attacker can trigger a buffer over-read on the heap of 5 bytes (WOLFSSL_CALLBACKS is only intended for debugging).
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
wolfssl
wolfssl
≤ 5.6.6
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.