CVE-2026-6681
PKCS#7 decode ignores caller output buffer size, writing past buffer bounds
Description
The PKCS#7 decode path ignores the caller-supplied output buffer size (outputSz), allowing decoded content to be written past the bounds of the provided buffer. This affects wolfSSL 5.9.0 and earlier and was fixed in the 5.9.1 release.
INFO
Published Date :
June 25, 2026, 8:11 p.m.
Last Modified :
June 25, 2026, 8:11 p.m.
Remotely Exploit :
No
Source :
wolfSSL
Affected Products
The following products are affected by CVE-2026-6681
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | LOW | 50d2cd11-d01a-48ed-9441-5bfce9d63b27 | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Update wolfSSL to version 5.9.1 or later.
- Verify output buffer sizes are correctly handled.
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The following list is the news that have been mention
CVE-2026-6681 vulnerability anywhere in the article.