Medium severity · published Oct 6, 2017
CVE-2014-2903
CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a crafted server certificate not authorized for use in an…
5.9
CVSS
1%
EPSS
No
On KEV
Description
CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a crafted server certificate not authorized for use in an SSL/TLS handshake.
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 61% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WO
Wolfssl · Wolfssl
through 2.9.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2014-2903
CVE.org
https://www.cve.org/CVERecord?id=CVE-2014-2903
Permissions Required
http://secunia.com/advisories/62604
Mailing List
http://www.openwall.com/lists/oss-security/2014/04/18/2
More from Wolfssl
9.8
CVE-2026-7531
Use-after-free in PQC hybrid key-share handling
9.8
CVE-2026-5264
DTLS 1.3 ACK heap buffer overflow
9.8
CVE-2026-5187
Heap Out-of-Bounds Write in DecodeObjectId() in wolfSSL
9.8
CVE-2026-4395
Heap-based buffer overflow in wc_ecc_import_x963_ex KCAPI path
9.8
CVE-2026-3849
Buffer Overflow in HPKE via Oversized ECH Config