CVE-2025-20165 json
Cisco BroadWorks SIP Denial of Service Vulnerability
published 2025-01-22 21 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-2157
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 58%
- public exploits
- 0
- none known
Summary
A vulnerability in the SIP processing subsystem of Cisco BroadWorks could allow an unauthenticated, remote attacker to halt the processing of incoming SIP requests, resulting in a denial of service (DoS) condition.
This vulnerability is due to improper memory handling for certain SIP requests. An attacker could exploit this vulnerability by sending a high number of SIP requests to an affected system. A successful exploit could allow the attacker to exhaust the memory that was allocated to the Cisco BroadWorks Network Servers that handle SIP traffic. If no memory is available, the Network Servers can no longer process incoming requests, resulting in a DoS condition that requires manual intervention to recover.
Patch / fix
- cisco broadworks_network_server 2024.11
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 21 mo ago
Exploit prediction
0.85% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Cisco Cisco BroadWorks
Classification
- Weakness
-
- CWE-789 Memory Allocation with Excessive Size Value
References
-
sec.cloudapps.cisco.com
/security/center/content/CiscoSecurityAdvisory/cisco-sa-bw-sip-dos-mSySbrmt
vendor-advisory
-
blog.clamav.net
/2025/01/clamav-142-and-108-security-patch.html
not-applicable
-
sec.cloudapps.cisco.com
/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-ole2-H549rphA
not-applicable
Sources
- CVE List CVE-2025-20165
- NVD CVE-2025-20165
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