How severe is CVE-2011-4022?

CVE-2011-4022 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-4022 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4022?

CVE-2011-4022 primarily affects Cisco Intrusion Prevention System. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4022?

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

When was CVE-2011-4022 published?

CVE-2011-4022 was published on 2012-05-03 and last updated on 2026-06-16.

CVE-2011-4022

CVE-2011-4022 is a medium-severity vulnerability in Cisco Intrusion Prevention System 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-287.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Cisco Intrusion Prevention System
Published: 2012-05-03
Last modified: 2026-06-16

Description

The sensor in Cisco Intrusion Prevention System (IPS) 7.0 and 7.1 allows remote attackers to cause a denial of service (file-handle exhaustion and mainApp hang) by making authentication attempts that exceed the configured limit, aka Bug ID CSCto51204.

Frequently asked questions

What is CVE-2011-4022?: The sensor in Cisco Intrusion Prevention System (IPS) 7.0 and 7.1 allows remote attackers to cause a denial of service (file-handle exhaustion and mainApp hang) by making authentication attempts that exceed the configured limit, aka Bug ID CSCto51204.
How severe is CVE-2011-4022?: CVE-2011-4022 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-4022 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4022?: CVE-2011-4022 primarily affects Cisco Intrusion Prevention System. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4022?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4022 published?: CVE-2011-4022 was published on 2012-05-03 and last updated on 2026-06-16.

References

http://www.cisco.com/web/software/282549709/56954/IPS-7-1-3-E4_readme.txt

Affected products (2)

cpe:2.3:a:cisco:intrusion_prevention_system:7.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:intrusion_prevention_system:7.1:*:*:*:*:*:*:*

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