How severe is CVE-2007-1833?

CVE-2007-1833 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2007-1833 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-1833?

CVE-2007-1833 primarily affects Cisco Unified Callmanager. In total, 25 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-1833?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2007-1833 published?

CVE-2007-1833 was published on 2007-04-03 and last updated on 2026-06-16.

CVE-2007-1833

CVE-2007-1833 is a medium-severity vulnerability in Cisco Unified Callmanager with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Unified Callmanager
Published: 2007-04-03
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2007-1833?: CVE-2007-1833 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2007-1833 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-1833?: CVE-2007-1833 primarily affects Cisco Unified Callmanager. In total, 25 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-1833?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-1833 published?: CVE-2007-1833 was published on 2007-04-03 and last updated on 2026-06-16.

References

Affected products (25)

cpe:2.3:a:cisco:unified_callmanager:3.3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:3.3\(2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:3.3\(2\)spb:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:3.3\(2\)spc:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:3.3\(3\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:3.3\(3\)sr1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:3.3\(3\)sr4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:3.3\(4\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:3.3\(4\)sr1a:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:3.3\(5\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:3.3\(5\)sr1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:3.3\(5\)sr1a:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:4.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:4.1\(2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:4.1\(3\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:4.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:5.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:5.0\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:5.0\(2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:5.0\(3\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:5.0\(3a\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:5.0\(4\):*:*:*:*:*:*:*

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