CVE-2011-3288

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-17. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
75.8%
KEV
Not listed

Published

October 6, 2011

Last Modified

April 29, 2026

Advisory Details (1)

Auto-updated May 6, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Jabber Extensible Communications Platform and Cisco Unified Presence XML Denial of Service Vulnerability - Cisco

https://www.cisco.com/c/en/us/support/docs/csa/cisco-sa-20110928-xcpcupsxml.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 38× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 103 total refreshes for this CVE.

  1. 2026-07-22 14:03 UTCEPSS rescore
  2. 2026-07-21 15:21 UTCEPSS rescore
  3. 2026-07-20 17:03 UTCEPSS rescore
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  1. 2026-06-30 23:19 UTCEPSS rescore
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  50. 2026-05-31 22:28 UTCEPSS rescore
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  56. 2026-05-29 06:44 UTCEG score recompute
  57. 2026-05-29 06:44 UTCGHSA enrichment
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  74. 2026-05-20 11:21 UTCEPSS rescore
  75. 2026-05-20 11:21 UTCEPSS rescore

Frequently asked(5)

What is CVE-2011-3288?
CVE-2011-3288 is a high vulnerability published on October 6, 2011. 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…
When was CVE-2011-3288 disclosed?
CVE-2011-3288 was first published in the National Vulnerability Database on October 6, 2011, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-3288 actively exploited?
CVE-2011-3288 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 75.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2011-3288?
CVE-2011-3288 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2011-3288?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-3288, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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