How severe is CVE-2011-0331?

CVE-2011-0331 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2011-0331 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0331?

CVE-2011-0331 affects Honeywell Scanserver Activex Control. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-0331?

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-2011-0331 published?

CVE-2011-0331 was published on 2011-03-22 and last updated on 2026-06-16.

CVE-2011-0331

CVE-2011-0331 is a critical-severity vulnerability in Honeywell Scanserver Activex Control with a CVSS 2.0 base score of 9.3. 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 9.3)
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Honeywell Scanserver Activex Control
Published: 2011-03-22
Last modified: 2026-06-16

Description

Use-after-free vulnerability in the addOSPLext method in the Honeywell ScanServer ActiveX control 780.0.20.5 allows remote attackers to execute arbitrary code via a crafted HTML document.

Frequently asked questions

What is CVE-2011-0331?: Use-after-free vulnerability in the addOSPLext method in the Honeywell ScanServer ActiveX control 780.0.20.5 allows remote attackers to execute arbitrary code via a crafted HTML document.
How severe is CVE-2011-0331?: CVE-2011-0331 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2011-0331 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0331?: CVE-2011-0331 affects Honeywell Scanserver Activex Control. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-0331?: 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-2011-0331 published?: CVE-2011-0331 was published on 2011-03-22 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:honeywell:scanserver_activex_control:780.0.20.5:*:*:*:*:*:*:*

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