How severe is CVE-2011-3143?

CVE-2011-3143 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2011-3143 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3143?

CVE-2011-3143 primarily affects Aveva Clearscada. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-3143?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-3143 published?

CVE-2011-3143 was published on 2011-08-16 and last updated on 2026-06-16.

CVE-2011-3143

CVE-2011-3143 is a critical-severity vulnerability in Aveva Clearscada with a CVSS 2.0 base score of 10.0. 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-399.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Aveva Clearscada
Published: 2011-08-16
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2011-3143?: 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.
How severe is CVE-2011-3143?: CVE-2011-3143 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2011-3143 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3143?: CVE-2011-3143 primarily affects Aveva Clearscada. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-3143?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-3143 published?: CVE-2011-3143 was published on 2011-08-16 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:aveva:clearscada:2005:*:*:*:*:*:*:*
cpe:2.3:a:aveva:clearscada:2007:*:*:*:*:*:*:*
cpe:2.3:a:aveva:clearscada:2009:*:*:*:*:*:*:*
cpe:2.3:a:schneider-electric:scx_67:*:*:*:*:*:*:*:*
cpe:2.3:a:schneider-electric:scx_68:*:*:*:*:*:*:*:*

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