How severe is CVE-2006-0743?

CVE-2006-0743 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2006-0743 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-0743?

CVE-2006-0743 affects Apache Log4net. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2006-0743?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2006-0743 published?

CVE-2006-0743 was published on 2006-03-09 and last updated on 2026-06-16.

CVE-2006-0743

CVE-2006-0743 is a medium-severity vulnerability in Apache Log4net with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-134.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-134
Affected product: Apache Log4net
Published: 2006-03-09
Last modified: 2026-06-16

Description

Format string vulnerability in LocalSyslogAppender in Apache log4net 1.2.9 might allow remote attackers to cause a denial of service (memory corruption and termination) via unknown vectors.

Frequently asked questions

What is CVE-2006-0743?: Format string vulnerability in LocalSyslogAppender in Apache log4net 1.2.9 might allow remote attackers to cause a denial of service (memory corruption and termination) via unknown vectors.
How severe is CVE-2006-0743?: CVE-2006-0743 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2006-0743 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-0743?: CVE-2006-0743 affects Apache Log4net. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-0743?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-0743 published?: CVE-2006-0743 was published on 2006-03-09 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apache:log4net:1.2.9_beta:*:*:*:*:*:*:*

More vulnerabilities in Apache Log4net

CVE-2018-1285 — Critical (CVSS 9.8): Apache log4net versions before 2.0.10 do not disable XML external entities when parsing log4net configuration files.…
CVE-2026-40021 — Medium (CVSS 5.3): Apache Log4net's XmlLayout https://logging.apache.org/log4net/manual/configuration/layouts.html#layout-list and…

All CVEs affecting Apache Log4net →

Other CWE-134 vulnerabilities

CVE-2012-1851 — Critical (CVSS 10.0): Format string vulnerability in the Print Spooler service in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2,…
CVE-2012-0242 — Critical (CVSS 10.0): Format string vulnerability in Advantech/BroadWin WebAccess before 7.0 allows remote attackers to execute arbitrary…
CVE-2011-2475 — Critical (CVSS 10.0): Format string vulnerability in ECTrace.dll in the iMailGateway service in the Internet Mail Gateway in OneBridge Server…
CVE-2011-1568 — Critical (CVSS 10.0): Format string vulnerability in the logText function in shmemmgr9.dll in IGSSdataServer.exe 9.00.00.11074, and…
CVE-2010-4235 — Critical (CVSS 10.0): Format string vulnerability in RealNetworks Helix Server 12.x, 13.x, and 14.x before 14.2, and Helix Mobile Server…
CVE-2011-0270 — Critical (CVSS 10.0): Format string vulnerability in nnmRptConfig.exe in HP OpenView Network Node Manager (OV NNM) 7.51 and 7.53 allows…

Browse all CWE-134 vulnerabilities →