Integer overflow in Wolfssl
CVE-2026-6678
Integer underflow in wc_PKCS7_DecryptOri when handling crafted Other Recipient Info, leading to incorrect length handling during decryption.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (23.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Wolfssl — versions 3.15.5
Weakness classification (CWE)
References
- github.com/wolfSSL/wolfssl/pull/10203 (Patch, patch, Issue Tracking)
- www.wolfssl.com/docs/security-vulnerabilities/ (Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-6678?
- CVE-2026-6678 is a medium-severity vulnerability in Wolfssl, classified under Integer Underflow. CVSS score: 5.3/10. Published 2026-06-25.
- How severe is CVE-2026-6678?
- Medium severity. CVSS v3 base score is 5.3 out of 10.