CVE-2008-1745

CVE-2008-1745 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-20.

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-20
• Affected product: Cisco Unified Communications Manager
• Published: 2008-05-16
• Last modified: 2026-06-16

Description

Cisco Unified Communications Manager (CUCM) 5.x before 5.1(2) and 6.x before 6.1(1) allows remote attackers to cause a denial of service (service interruption) via a SIP JOIN message with a malformed header, aka Bug ID CSCsi48115.

Frequently asked questions

What is CVE-2008-1745?

Cisco Unified Communications Manager (CUCM) 5.x before 5.1(2) and 6.x before 6.1(1) allows remote attackers to cause a denial of service (service interruption) via a SIP JOIN message with a malformed header, aka Bug ID CSCsi48115.

How severe is CVE-2008-1745?

CVE-2008-1745 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2008-1745 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-2008-1745?

CVE-2008-1745 primarily affects Cisco Unified Communications Manager. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-1745?

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-2008-1745 published?

CVE-2008-1745 was published on 2008-05-16 and last updated on 2026-06-16.

References

• http://secunia.com/advisories/30238
• http://securitytracker.com/id?1020022
• http://www.cisco.com/en/US/products/products_security_advisory09186a0080995688.shtml
• http://www.securityfocus.com/bid/29221
• http://www.vupen.com/english/advisories/2008/1533
• https://exchange.xforce.ibmcloud.com/vulnerabilities/42417

Affected products (21)

• cpe:2.3:a:cisco:unified_communications_manager:4.1:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:unified_communications_manager:4.1:\(3\)sr.5:*:*:*:*:*:*
• cpe:2.3:a:cisco:unified_communications_manager:4.1:\(3\)sr4:*:*:*:*:*:*
• cpe:2.3:a:cisco:unified_communications_manager:4.1:\(3\)sr5:*:*:*:*:*:*
• cpe:2.3:a:cisco:unified_communications_manager:4.1:\(3\)sr5b:*:*:*:*:*:*
• cpe:2.3:a:cisco:unified_communications_manager:4.1:\(3\)sr5c:*:*:*:*:*:*
• cpe:2.3:a:cisco:unified_communications_manager:4.2:4.2\(3\)sr.2:*:*:*:*:*:*
• cpe:2.3:a:cisco:unified_communications_manager:4.2:4.2_\(3\)sr2b:*:*:*:*:*:*
• cpe:2.3:a:cisco:unified_communications_manager:4.2:4.2_\(3\)sr3:*:*:*:*:*:*
• cpe:2.3:a:cisco:unified_communications_manager:4.3:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:unified_communications_manager:4.3:4.3\(1\)sr.1:*:*:*:*:*:*
• cpe:2.3:a:cisco:unified_communications_manager:5.1:\(1\):*:*:*:*:*:*
• 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:\(3a\):*:*:*:*:*:*
• 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:\(1a\):*:*:*:*:*:*

More vulnerabilities in Cisco Unified Communications Manager

• CVE-2025-20309 — Critical (CVSS 10.0): A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session…
• CVE-2021-44228 — Critical (CVSS 10.0): Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in…
• CVE-2011-1643 — Critical (CVSS 10.0): Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 6.x, 7.x before 7.1(5b)su4, 8.0, and 8.5 before…
• CVE-2008-1154 — Critical (CVSS 10.0): The Disaster Recovery Framework (DRF) master server in Cisco Unified Communications products, including Unified…
• CVE-2008-0027 — Critical (CVSS 10.0): Heap-based buffer overflow in the Certificate Trust List (CTL) Provider service (CTLProvider.exe) in Cisco Unified…
• CVE-2007-5538 — Critical (CVSS 10.0): Buffer overflow in the Centralized TFTP File Locator Service in Cisco Unified Communications Manager (CUCM, formerly…

All CVEs affecting Cisco Unified Communications Manager →

Other CWE-20 (Improper Input Validation) vulnerabilities

• CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
• CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
• CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
• CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
• CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
• CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →