CVE-2026-6678
Received Received - Intake
Integer Underflow in wolfSSL PKCS#7 Decryption

Publication date: 2026-06-25

Last updated on: 2026-06-25

Assigner: wolfSSL Inc.

Description
Integer underflow in wc_PKCS7_DecryptOri when handling crafted Other Recipient Info, leading to incorrect length handling during decryption.
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Meta Information
Published
2026-06-25
Last Modified
2026-06-25
Generated
2026-06-26
AI Q&A
2026-06-26
EPSS Evaluated
N/A
NVD
CVE-2026-6678
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
wolfssl wc_pkcs7_decryptori *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-191 The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
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Executive Summary

This vulnerability is an integer underflow occurring in the function wc_PKCS7_DecryptOri when it processes crafted Other Recipient Info. This flaw causes incorrect length handling during the decryption process.

Impact Analysis

The vulnerability leads to incorrect length handling during decryption, which may cause unexpected behavior or errors in the decryption process. However, the CVSS base score is low (1.0), indicating a limited impact.

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