Is CVE-2011-3143 in the CISA KEV catalog?

No. CVE-2011-3143 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-3143?

CVE-2011-3143 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-2011-3143?

CVE-2011-3143 has an EPSS score of 5.99% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2011-3143?

Upgrade scx 67 to r4.5 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2011-3143

HIGHEPSS 92th pctl

10.0

CVSS v2

NVD

Description

Use-after-free vulnerability in Control Microsystems ClearSCADA 2005, 2007, and 2009 before R2.3 and R1.4, as used in SCX before 67 R4.5 and 68 R3.9, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified long strings that trigger heap memory corruption.

CWE-399Resource Management Errors

How to fix

Remediation Available

scx 67NVD

Affected:< r4.5Fixed in:r4.5CVE-2011-3143derived from NVD

scx 68NVD

Affected:< r3.9Fixed in:r3.9CVE-2011-3143derived from NVD

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

5.99%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Patch2

Third-Party Advisory3

Other references1

osvdb.org

Related Vulnerabilities

Other CWE-399 (Resource Management Errors) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2009-3103	High	10.0	90%	-	-
CVE-2009-0075	High	9.3	85%	-	-
CVE-2005-1790	Low	2.6	83%	-	-
CVE-2010-0806	High	8.8	82%	KEV	-
CVE-2009-2526	High	7.8	82%	-	-
CVE-2015-1868	High	7.8	82%	-	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 2026-04-29.