CVE-2026-6092: Encrypt-then-MAC could fall back to MAC-then-Encrypt when HAVE_ENCRYPT_THEN_MAC is configured

Medium severity · published Jun 25, 2026

CVE-2026-6092

Encrypt-then-MAC could fall back to MAC-then-Encrypt when HAVE_ENCRYPT_THEN_MAC is configured

5.3

CVSS

0.4%

EPSS

On KEV

Description

When HAVE_ENCRYPT_THEN_MAC is configured, the implementation could fall back to MAC-then-Encrypt rather than enforcing Encrypt-then-MAC.

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

Low

Integrity

None

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.4% · higher than 32% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

wolfSSL · wolfSSL

5.2.0 through 5.9.1 · source: vendor, NVD

Affected product

wolfSSL

All wolfSSL CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-6092

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-6092

Issue Tracking

https://github.com/wolfSSL/wolfssl/pull/10167

Vendor Advisory

https://www.wolfssl.com/docs/security-vulnerabilities/