CVE-2012-1558

yaSSL CyaSSL before 2.0.8 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted X.509 certificate.

Published: 2012-03-12 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-1558 is rated Moderate Risk (45.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.45%). EPSS rose +1.05% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2012-1558

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.40% 1.45% +1.05%
2 2025-03-17 0.89% 0.40% -0.50%
3 2023-03-07 — 0.89% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-1558

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2012-1558

Affected software / configurations for CVE-2012-1558

Vendor Product Version Raw CPE
yassl cyassl <= 2.0.6 cpe:2.3:a:yassl:cyassl:*:*:*:*:*:*:*:*
yassl cyassl 0.2.0 cpe:2.3:a:yassl:cyassl:0.2.0:*:*:*:*:*:*:*
yassl cyassl 0.3.0 cpe:2.3:a:yassl:cyassl:0.3.0:*:*:*:*:*:*:*
yassl cyassl 0.4.0 cpe:2.3:a:yassl:cyassl:0.4.0:*:*:*:*:*:*:*
yassl cyassl 0.5.0 cpe:2.3:a:yassl:cyassl:0.5.0:*:*:*:*:*:*:*
yassl cyassl 0.5.5 cpe:2.3:a:yassl:cyassl:0.5.5:*:*:*:*:*:*:*
yassl cyassl 0.6.0 cpe:2.3:a:yassl:cyassl:0.6.0:*:*:*:*:*:*:*
yassl cyassl 0.6.2 cpe:2.3:a:yassl:cyassl:0.6.2:*:*:*:*:*:*:*
yassl cyassl 0.6.3 cpe:2.3:a:yassl:cyassl:0.6.3:*:*:*:*:*:*:*
yassl cyassl 0.8.0 cpe:2.3:a:yassl:cyassl:0.8.0:*:*:*:*:*:*:*
yassl cyassl 0.9.0 cpe:2.3:a:yassl:cyassl:0.9.0:*:*:*:*:*:*:*
yassl cyassl 0.9.6 cpe:2.3:a:yassl:cyassl:0.9.6:*:*:*:*:*:*:*
yassl cyassl 0.9.8 cpe:2.3:a:yassl:cyassl:0.9.8:*:*:*:*:*:*:*
yassl cyassl 0.9.9 cpe:2.3:a:yassl:cyassl:0.9.9:*:*:*:*:*:*:*
yassl cyassl 1.0.0 cpe:2.3:a:yassl:cyassl:1.0.0:rc1:*:*:*:*:*:*
yassl cyassl 1.0.0 cpe:2.3:a:yassl:cyassl:1.0.0:rc2:*:*:*:*:*:*
yassl cyassl 1.0.0 cpe:2.3:a:yassl:cyassl:1.0.0:rc3:*:*:*:*:*:*
yassl cyassl 1.0.2 cpe:2.3:a:yassl:cyassl:1.0.2:*:*:*:*:*:*:*
yassl cyassl 1.0.3 cpe:2.3:a:yassl:cyassl:1.0.3:*:*:*:*:*:*:*
yassl cyassl 1.0.6 cpe:2.3:a:yassl:cyassl:1.0.6:*:*:*:*:*:*:*
yassl cyassl 1.1.0 cpe:2.3:a:yassl:cyassl:1.1.0:*:*:*:*:*:*:*
yassl cyassl 1.2.0 cpe:2.3:a:yassl:cyassl:1.2.0:*:*:*:*:*:*:*
yassl cyassl 1.3.0 cpe:2.3:a:yassl:cyassl:1.3.0:*:*:*:*:*:*:*
yassl cyassl 1.4.0 cpe:2.3:a:yassl:cyassl:1.4.0:*:*:*:*:*:*:*
yassl cyassl 1.5.0 cpe:2.3:a:yassl:cyassl:1.5.0:*:*:*:*:*:*:*
yassl cyassl 1.5.4 cpe:2.3:a:yassl:cyassl:1.5.4:*:*:*:*:*:*:*
yassl cyassl 1.5.6 cpe:2.3:a:yassl:cyassl:1.5.6:*:*:*:*:*:*:*
yassl cyassl 1.6.0 cpe:2.3:a:yassl:cyassl:1.6.0:*:*:*:*:*:*:*
yassl cyassl 1.6.5 cpe:2.3:a:yassl:cyassl:1.6.5:*:*:*:*:*:*:*
yassl cyassl 1.8.0 cpe:2.3:a:yassl:cyassl:1.8.0:*:*:*:*:*:*:*
yassl cyassl 1.9.0 cpe:2.3:a:yassl:cyassl:1.9.0:*:*:*:*:*:*:*
yassl cyassl 2.0.0 cpe:2.3:a:yassl:cyassl:2.0.0:rc1:*:*:*:*:*:*
yassl cyassl 2.0.0 cpe:2.3:a:yassl:cyassl:2.0.0:rc2:*:*:*:*:*:*
yassl cyassl 2.0.0 cpe:2.3:a:yassl:cyassl:2.0.0:rc3:*:*:*:*:*:*
yassl cyassl 2.0.2 cpe:2.3:a:yassl:cyassl:2.0.2:*:*:*:*:*:*:*

References for CVE-2012-1558

cvelogic Threat Intelligence