How severe is CVE-2008-0027?

CVE-2008-0027 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2008-0027 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 57% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-0027?

CVE-2008-0027 primarily affects Cisco Unified Callmanager. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-0027?

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

When was CVE-2008-0027 published?

CVE-2008-0027 was published on 2008-01-17 and last updated on 2026-06-16.

CVE-2008-0027

CVE-2008-0027 is a critical-severity vulnerability in Cisco Unified Callmanager with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 57% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 57% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Cisco Unified Callmanager
Published: 2008-01-17
Last modified: 2026-06-16

Description

Heap-based buffer overflow in the Certificate Trust List (CTL) Provider service (CTLProvider.exe) in Cisco Unified Communications Manager (CUCM) 4.2 before 4.2(3)SR3 and 4.3 before 4.3(1)SR1, and CallManager 4.0 and 4.1 before 4.1(3)SR5c, allows remote attackers to cause a denial of service or execute arbitrary code via a long request.

Frequently asked questions

What is CVE-2008-0027?: Heap-based buffer overflow in the Certificate Trust List (CTL) Provider service (CTLProvider.exe) in Cisco Unified Communications Manager (CUCM) 4.2 before 4.2(3)SR3 and 4.3 before 4.3(1)SR1, and CallManager 4.0 and 4.1 before 4.1(3)SR5c, allows remote attackers to cause a denial of service or execute arbitrary code via a long request.
How severe is CVE-2008-0027?: CVE-2008-0027 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2008-0027 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 57% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-0027?: CVE-2008-0027 primarily affects Cisco Unified Callmanager. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-0027?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2008-0027 published?: CVE-2008-0027 was published on 2008-01-17 and last updated on 2026-06-16.

References

Affected products (9)

cpe:2.3:a:cisco:unified_callmanager:4.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:4.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr5:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr5b:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:4.2:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*

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