CVE-2007-1833

The Skinny Call Control Protocol (SCCP) implementation in Cisco Unified CallManager (CUCM) 3.3 before 3.3(5)SR2a, 4.1 before 4.1(3)SR4, 4.2 before 4.2(3)SR1, and 5.0 before 5.0(4a)SU1 allows remote attackers to cause a denial of service (loss of voice services) by sending crafted packets to the (1) SCCP (2000/tcp) or (2) SCCPS (2443/tcp) port.

Published: 2007-04-02 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-1833 is rated Moderate Risk (48.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.35%). 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-2007-1833

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 2026-06-15 2.73% 2.35% -0.37%
2 2026-04-27 2.62% 2.73% +0.10%
3 2025-11-20 — 2.62% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-1833

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P 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:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2007-1833

Affected software / configurations for CVE-2007-1833

Vendor Product Version Raw CPE
cisco unified_callmanager 3.3 cpe:2.3:a:cisco:unified_callmanager:3.3:*:*:*:*:*:*:*
cisco unified_callmanager 3.3\(2\) cpe:2.3:a:cisco:unified_callmanager:3.3\(2\):*:*:*:*:*:*:*
cisco unified_callmanager 3.3\(2\)spb cpe:2.3:a:cisco:unified_callmanager:3.3\(2\)spb:*:*:*:*:*:*:*
cisco unified_callmanager 3.3\(2\)spc cpe:2.3:a:cisco:unified_callmanager:3.3\(2\)spc:*:*:*:*:*:*:*
cisco unified_callmanager 3.3\(3\) cpe:2.3:a:cisco:unified_callmanager:3.3\(3\):*:*:*:*:*:*:*
cisco unified_callmanager 3.3\(3\)sr1 cpe:2.3:a:cisco:unified_callmanager:3.3\(3\)sr1:*:*:*:*:*:*:*
cisco unified_callmanager 3.3\(3\)sr4 cpe:2.3:a:cisco:unified_callmanager:3.3\(3\)sr4:*:*:*:*:*:*:*
cisco unified_callmanager 3.3\(4\) cpe:2.3:a:cisco:unified_callmanager:3.3\(4\):*:*:*:*:*:*:*
cisco unified_callmanager 3.3\(4\)sr1a cpe:2.3:a:cisco:unified_callmanager:3.3\(4\)sr1a:*:*:*:*:*:*:*
cisco unified_callmanager 3.3\(5\) cpe:2.3:a:cisco:unified_callmanager:3.3\(5\):*:*:*:*:*:*:*
cisco unified_callmanager 3.3\(5\)sr1 cpe:2.3:a:cisco:unified_callmanager:3.3\(5\)sr1:*:*:*:*:*:*:*
cisco unified_callmanager 3.3\(5\)sr1a cpe:2.3:a:cisco:unified_callmanager:3.3\(5\)sr1a:*:*:*:*:*:*:*
cisco unified_callmanager 4.1 cpe:2.3:a:cisco:unified_callmanager:4.1:*:*:*:*:*:*:*
cisco unified_callmanager 4.1\(2\) cpe:2.3:a:cisco:unified_callmanager:4.1\(2\):*:*:*:*:*:*:*
cisco unified_callmanager 4.1\(3\) cpe:2.3:a:cisco:unified_callmanager:4.1\(3\):*:*:*:*:*:*:*
cisco unified_callmanager 4.1\(3\)sr1 cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr1:*:*:*:*:*:*:*
cisco unified_callmanager 4.1\(3\)sr2 cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr2:*:*:*:*:*:*:*
cisco unified_callmanager 4.1\(3\)sr3 cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr3:*:*:*:*:*:*:*
cisco unified_callmanager 4.2 cpe:2.3:a:cisco:unified_callmanager:4.2:*:*:*:*:*:*:*
cisco unified_callmanager 5.0 cpe:2.3:a:cisco:unified_callmanager: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\(4\):*:*:*:*:*:*:*

References for CVE-2007-1833

cvelogic Threat Intelligence