CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green
Lifecycle Timeline
3Description
1-byte OOB heap read in wc_PKCS7_DecodeEnvelopedData via zero-length encrypted content. A vulnerability existed in wolfSSL 5.8.4 and earlier, where a 1-byte out-of-bounds heap read in wc_PKCS7_DecodeEnvelopedData could be triggered by a crafted CMS EnvelopedData message with zero-length encrypted content. Note that PKCS7 support is disabled by default.
Analysis
1-byte OOB heap read in wc_PKCS7_DecodeEnvelopedData via zero-length encrypted content.
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Remediation
During next maintenance window: Apply vendor patches when convenient. Verify out-of-bounds read controls are in place.
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External POC / Exploit Code
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EUVD-2026-13233