How severe is CVE-2013-3453?

CVE-2013-3453 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2013-3453 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-3453?

CVE-2013-3453 primarily affects Cisco Unified Communications Manager. In total, 115 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-3453?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2013-3453 published?

CVE-2013-3453 was published on 2013-08-22 and last updated on 2026-06-16.

CVE-2013-3453

CVE-2013-3453 is a high-severity vulnerability in Cisco Unified Communications Manager with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Unified Communications Manager
Published: 2013-08-22
Last modified: 2026-06-16

Description

Memory leak in Cisco Unified Communications Manager IM and Presence Service before 8.6(5)SU1 and 9.x before 9.1(2), and Cisco Unified Presence, allows remote attackers to cause a denial of service (memory and CPU consumption) by making many TCP connections to port (1) 5060 or (2) 5061, aka Bug ID CSCud84959.

Frequently asked questions

What is CVE-2013-3453?: Memory leak in Cisco Unified Communications Manager IM and Presence Service before 8.6(5)SU1 and 9.x before 9.1(2), and Cisco Unified Presence, allows remote attackers to cause a denial of service (memory and CPU consumption) by making many TCP connections to port (1) 5060 or (2) 5061, aka Bug ID CSCud84959.
How severe is CVE-2013-3453?: CVE-2013-3453 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2013-3453 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-3453?: CVE-2013-3453 primarily affects Cisco Unified Communications Manager. In total, 115 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-3453?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2013-3453 published?: CVE-2013-3453 was published on 2013-08-22 and last updated on 2026-06-16.

References

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130821-cup

Affected products (115)

cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:3.3\(5\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:3.3\(5\)sr1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:3.3\(5\)sr2a:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.1\(3\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.1\(3\)sr1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.1\(3\)sr2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.1\(3\)sr3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.1\(3\)sr4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.2.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.2.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.2.3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.2.3sr1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.2.3sr2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.2.3sr2b:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.3\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1\(1b\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1\(1c\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1\(2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1\(2a\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1\(2b\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1\(3\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1\(3a\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1\(3c\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1\(3d\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1\(3e\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:5.1.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.0\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.0\(1a\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.0\(1b\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.1\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.1\(1a\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.1\(1b\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.1\(2\):*:*:*:*:*:*:*

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