NVD

CVE-2024-20375 Detail

Description

A vulnerability in the SIP call processing function of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper parsing of SIP messages. An attacker could exploit this vulnerability by sending a crafted SIP message to an affected Cisco Unified CM or Cisco Unified CM SME device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition that interrupts the communications of reliant voice and video devices.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 7.5 HIGH

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Nist CVSS score does not match with CNA score

CNA: Cisco Systems, Inc.

Base Score: 8.6 HIGH

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-dos-kkHq43We	Cisco Systems, Inc.	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	Cisco Systems, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

4 change records found show changes

Initial Analysis by NIST 8/01/2025 4:37:23 PM

Action

Type

Old Value

New Value

Added

CVSS V3.1

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Added

CPE Configuration

OR
          *cpe:2.3:a:cisco:unified_communications_manager:12.5(1):*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.5(1)su7:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.5(1)su2:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.5(1)su4:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.5(1)su3:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.5(1)su5:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.0(1)su1:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.0(1)su2:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.0(1)su3:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.0(1)su4:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.0(1)su5:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.5(1)su1:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.5(1)su6:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.5(1)su7a:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.5(1)su8:*:*:*:*:*:*:*
          *cpe:2.3:a:cisco:unified_communications_manager:12.5(1)su8a:*:*:*:*:*:*:*

Added

Reference Type

Cisco Systems, Inc.: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-dos-kkHq43We Types: Vendor Advisory

New CVE Received from Cisco Systems, Inc. 8/21/2024 1:15:07 PM

Action	Type	New Value
Added	Description	A vulnerability in the SIP call processing function of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper parsing of SIP messages. An attacker could exploit this vulnerability by sending a crafted SIP message to an affected Cisco Unified CM or Cisco Unified CM SME device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition that interrupts the communications of reliant voice and video devices.
Added	CVSS V3.1	Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Added	CWE	Cisco Systems, Inc. CWE-787
Added	Reference	Cisco Systems, Inc. https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-dos-kkHq43We [No types assigned]

Quick Info

CVE Dictionary Entry:
CVE-2024-20375
NVD Published Date:
08/21/2024
NVD Last Modified:
06/17/2026
Source:
Cisco Systems, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2024-20375 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by CISA-ADP 6/17/2026 3:06:51 AM

CVE Modified by Cisco Systems, Inc. 6/17/2026 3:06:51 AM

Initial Analysis by NIST 8/01/2025 4:37:23 PM

New CVE Received from Cisco Systems, Inc. 8/21/2024 1:15:07 PM

Quick Info