CVE-2006-5553

Cisco Security Agent (CSA) for Linux 4.5 before 4.5.1.657 and 5.0 before 5.0.0.193, as used by Unified CallManager (CUCM) and Unified Presence Server (CUPS), allows remote attackers to cause a denial of service (resource consumption) via a port scan with certain options.

Published: 2006-10-26 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-5553 is rated Moderate Risk (61.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.06%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2006-5553

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-19 3.04% 3.06% +0.03%
2 2026-06-15 1.16% 3.04% +1.88%
3 2025-06-14 — 1.16% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-5553

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2006-5553

OS Trackers for CVE-2006-5553

vendor priority summary link
alpine — CVE-2006-5553: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. https://security.alpinelinux.org/vuln/CVE-2006-5553

NVD evaluator notes for CVE-2006-5553

Solution: This vulnerability is addressed in the following product updates: Cisco, Unified CallManager, 5.0(4) Cisco, Unified CallManager, 5.0(4a) with CSA COP upgrade Cisco, Unified Presence Server, 1.0(2) with CSA COP upgrade Cisco, Security Agent, 5.0.193 Cisco, Security Agent, 4.5.1.657 Cisco, Security Agent, 5.1

Affected software / configurations for CVE-2006-5553

Vendor Product Version Raw CPE
cisco security_agent 4.5 cpe:2.3:a:cisco:security_agent:4.5:*:*:*:*:*:*:*
cisco security_agent 4.5.1 cpe:2.3:a:cisco:security_agent:4.5.1:*:*:*:*:*:*:*
cisco security_agent 4.5.1.639 cpe:2.3:a:cisco:security_agent:4.5.1.639:*:*:*:*:*:*:*
cisco security_agent 5.0 cpe:2.3:a:cisco:security_agent:5.0:*:*:*:*:*:*:*
cisco unified_callmanager 5.0\(1\) cpe:2.3:a:cisco:unified_callmanager:5.0\(1\):*:*:*:*:*:*:*
cisco unified_callmanager 5.0\(2\) cpe:2.3:a:cisco:unified_callmanager:5.0\(2\):*:*:*:*:*:*:*
cisco unified_callmanager 5.0\(3\) cpe:2.3:a:cisco:unified_callmanager:5.0\(3\):*:*:*:*:*:*:*
cisco unified_callmanager 5.0\(3a\) cpe:2.3:a:cisco:unified_callmanager:5.0\(3a\):*:*:*:*:*:*:*
cisco unified_callmanager 5.0\(4\) cpe:2.3:a:cisco:unified_callmanager:5.0\(4\):*:*:*:*:*:*:*
cisco unified_presence_server 1.0 cpe:2.3:a:cisco:unified_presence_server:1.0:*:*:*:*:*:*:*
cisco unified_presence_server 1.0\(2\) cpe:2.3:a:cisco:unified_presence_server:1.0\(2\):*:*:*:*:*:*:*

References for CVE-2006-5553

cvelogic Threat Intelligence