How severe is CVE-2010-0591?

CVE-2010-0591 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2010-0591 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-0591?

CVE-2010-0591 primarily affects Cisco Unified Communications Manager. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-0591?

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-2010-0591 published?

CVE-2010-0591 was published on 2010-03-05 and last updated on 2026-06-16.

CVE-2010-0591

CVE-2010-0591 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.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Unified Communications Manager
Published: 2010-03-05
Last modified: 2026-06-16

Description

Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 6.x before 6.1(5), 7.x before 7.1(3b)SU2, and 8.x before 8.0(1) allows remote attackers to cause a denial of service (process failure) via a malformed SIP REG message, related to an overflow of the Telephone-URL field, aka Bug ID CSCtc62362.

Frequently asked questions

What is CVE-2010-0591?: Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 6.x before 6.1(5), 7.x before 7.1(3b)SU2, and 8.x before 8.0(1) allows remote attackers to cause a denial of service (process failure) via a malformed SIP REG message, related to an overflow of the Telephone-URL field, aka Bug ID CSCtc62362.
How severe is CVE-2010-0591?: CVE-2010-0591 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2010-0591 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-0591?: CVE-2010-0591 primarily affects Cisco Unified Communications Manager. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-0591?: 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-2010-0591 published?: CVE-2010-0591 was published on 2010-03-05 and last updated on 2026-06-16.

References

Affected products (18)

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:6.1:*:*:*:*:*:*:*
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\(2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.1\(2\)su1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.1\(2\)su1a:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.1\(3\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.1\(4\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:6.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:7.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:7.0\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:7.0\(2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:7.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:8.0:*:*:*:*:*:*:*

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