CVE-2026-6678
Integer underflow in wc_PKCS7_DecryptOri when handling crafted Other Recipient Info, leading to incorrect length handling during decryption.
CSIRTS triage
- What
- Integer underflow in wc_PKCS7_DecryptOri handling crafted Other Recipient Info.
- Who is affected
- Deployments using the affected cryptographic functions.
- Urgency
- Remediation is medium urgency due to the medium severity rating.
- Action
- Apply the relevant patches to fix the integer underflow issue.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all EPSS-scored CVEs.
Advisory coverage (2)
External references
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[](https://www.csirts.com/cve/CVE-2026-6678)