How severe is CVE-2007-5538?

CVE-2007-5538 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2007-5538 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-5538?

CVE-2007-5538 primarily affects Cisco Unified Callmanager. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-5538?

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-2007-5538 published?

CVE-2007-5538 was published on 2007-10-18 and last updated on 2026-06-16.

CVE-2007-5538

CVE-2007-5538 is a critical-severity vulnerability in Cisco Unified Callmanager with a CVSS 2.0 base score of 10.0. 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-119.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Cisco Unified Callmanager
Published: 2007-10-18
Last modified: 2026-06-16

Description

Buffer overflow in the Centralized TFTP File Locator Service in Cisco Unified Communications Manager (CUCM, formerly CallManager) 5.1 before 5.1(3), and Unified CallManager 5.0, allows remote attackers to execute arbitrary code or cause a denial of service via unspecified vectors involving the processing of filenames, aka CSCsh47712.

Frequently asked questions

What is CVE-2007-5538?: Buffer overflow in the Centralized TFTP File Locator Service in Cisco Unified Communications Manager (CUCM, formerly CallManager) 5.1 before 5.1(3), and Unified CallManager 5.0, allows remote attackers to execute arbitrary code or cause a denial of service via unspecified vectors involving the processing of filenames, aka CSCsh47712.
How severe is CVE-2007-5538?: CVE-2007-5538 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2007-5538 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-5538?: CVE-2007-5538 primarily affects Cisco Unified Callmanager. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-5538?: 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-2007-5538 published?: CVE-2007-5538 was published on 2007-10-18 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:cisco:unified_callmanager:5.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*

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