Is CVE-2011-3288 in the CISA KEV catalog?

No. CVE-2011-3288 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-3288?

CVE-2011-3288 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2011-3288?

CVE-2011-3288 has an EPSS score of 1.77% (75th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2011-3288?

Upgrade unified presence to 8.5(4) or later.

CVE & CISA-KEV Catalog

CVE-2011-3288

HIGHEPSS 75th pctl

7.5

CVSS v3

NVD

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.

CWE-776

How to fix

Remediation Available

unified presenceNVD

Affected:< 8.5(4)Fixed in:8.5(4)CVE-2011-3288derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

1.77%probability of exploitation in 30 days

75thpercentile

Elevated risk: more likely to be exploited than 75% of all known CVEs.

References

Vendor Advisory1

cisco.com

Other references1

cisco.com

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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.