Is CVE-2009-4484 in the CISA KEV catalog?

No. CVE-2009-4484 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-4484?

CVE-2009-4484 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2009-4484?

CVE-2009-4484 has an EPSS score of 69.55% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-4484?

Upgrade MariaDB to 5.1.42 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2009-4484

HIGHEPSS 99th pctl

7.5

CVSS v2

NVD

Description

Multiple stack-based buffer overflows in the CertDecoder::GetName function in src/asn.cpp in TaoCrypt in yaSSL before 1.9.9, as used in mysqld in MySQL 5.0.x before 5.0.90, MySQL 5.1.x before 5.1.43, MySQL 5.5.x through 5.5.0-m2, and other products, allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption and daemon crash) by establishing an SSL connection and sending an X.509 client certificate with a crafted name field, as demonstrated by mysql_overflow1.py and the vd_mysql5 module in VulnDisco Pack Professional 8.11. NOTE: this was originally reported for MySQL 5.0.51a.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

MariaDBWindows application

Affected:5.1 5.1.42Fixed in:5.1.42MariaDB Corporation Ab

MySQLWindows application

Affected:5.0.0 5.0.90Fixed in:5.0.90Oracle Corporation

Affected:5.1.0 5.1.43Fixed in:5.1.43Oracle Corporation

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

69.55%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.