CVE-2026-6094: Heap buffer overread in wc_PKCS7_DecodeEnvelopedData parsing crafted PKCS7 EnvelopedData
CSIRTS triage
- What
- Heap buffer overread can occur when parsing crafted PKCS7 EnvelopedData.
- Who is affected
- Users of OpenSSL that handle PKCS7 EnvelopedData.
- Urgency
- This is a critical issue with a high CVSS score, requiring immediate remediation.
- Action
- Update to the latest version of OpenSSL.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-6094
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-60940.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-6094 | coverage & exploitation status | NVD · CVE.org |
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