CVE-2026-6678 — MEDIUM (5.3)

Q: What is CVE-2026-6678?

CVE-2026-6678 is a vulnerability with a CVSS score of 5.3 (MEDIUM). Integer underflow in wc_PKCS7_DecryptOri when handling crafted Other Recipient Info, leading to incorrect length handling during decryption.

Q: How severe is CVE-2026-6678?

CVE-2026-6678 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-6678?

Check the references section above for vendor advisories and patch information. Affected products include: Wolfssl Wolfssl.

Vulnerability Description

Integer underflow in wc_PKCS7_DecryptOri when handling crafted Other Recipient Info, leading to incorrect length handling during decryption.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

LOW

Affected Products

Vendor	Product	Versions
Wolfssl	Wolfssl	>= 3.15.5, < 5.9.2

Related Weaknesses (CWE)

CWE-191

References

https://github.com/wolfSSL/wolfssl/pull/10203Issue TrackingPatch
https://www.wolfssl.com/docs/security-vulnerabilities/Vendor Advisory

FAQ

What is CVE-2026-6678?

CVE-2026-6678 is a vulnerability with a CVSS score of 5.3 (MEDIUM). Integer underflow in wc_PKCS7_DecryptOri when handling crafted Other Recipient Info, leading to incorrect length handling during decryption.

How severe is CVE-2026-6678?

CVE-2026-6678 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-6678?

Check the references section above for vendor advisories and patch information. Affected products include: Wolfssl Wolfssl.