How severe is CVE-2011-3288?

CVE-2011-3288 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2011-3288 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3288?

CVE-2011-3288 affects Cisco Unified Presence. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-3288?

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

When was CVE-2011-3288 published?

CVE-2011-3288 was published on 2011-10-06 and last updated on 2026-06-16.

CVE-2011-3288

CVE-2011-3288 is a high-severity vulnerability in Cisco Unified Presence with a CVSS 3.x base score of 7.5. 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-776.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-776
Affected product: Cisco Unified Presence
Published: 2011-10-06
Last modified: 2026-06-16

Description

Cisco Unified Presence before 8.5(4) does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption, and process crash) via a crafted XML document containing a large number of nested entity references, aka Bug IDs CSCtq89842 and CSCtq88547, a similar issue to CVE-2003-1564.

Frequently asked questions

What is CVE-2011-3288?: Cisco Unified Presence before 8.5(4) does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption, and process crash) via a crafted XML document containing a large number of nested entity references, aka Bug IDs CSCtq89842 and CSCtq88547, a similar issue to CVE-2003-1564.
How severe is CVE-2011-3288?: CVE-2011-3288 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2011-3288 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3288?: CVE-2011-3288 affects Cisco Unified Presence. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-3288?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2011-3288 published?: CVE-2011-3288 was published on 2011-10-06 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:cisco:unified_presence:*:*:*:*:*:*:*:*

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