CVE-2025-20165: A vulnerability in the SIP processing subsystem of Cisco BroadWorks could allow an unauthenticated, remote att

Q: How do I fix CVE-2025-20165?

broadworks network server: upgrade to 2024.11. Exact commands for each OS are on this page.

Q: Is CVE-2025-20165 being exploited?

CVE-2025-20165 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-20165 affect?

CVE-2025-20165 affects broadworks network server. Severity is high (CVSS 7.5). 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

Q: How urgent is CVE-2025-20165?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2025-20165 is a high-severity flaw (CVSS 7.5) affecting broadworks network server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 attack

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 42%)
CISA exploited list	No
Weakness	CWE-789
Published	2025-01-22
Last modified	2026-06-17

Publisher (CNA): Cisco Systems, Inc. · Vendor: cisco

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-01-22 17:15 UTCPublished CVE record published
2026-06-17 08:40 UTCUpdated Record last modified

cisco broadworks network server UPGRADE

Affected: < 2024.11

Fixed in: 2024.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy broadworks-network-server || rpm -q broadworks-network-server || broadworks-network-server --version

2. UPGRADE to 2024.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade broadworks-network-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade broadworks-network-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-20165?

broadworks network server: upgrade to 2024.11. Exact commands for each OS are on this page.

Is CVE-2025-20165 being exploited?

CVE-2025-20165 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-20165 affect?

CVE-2025-20165 affects broadworks network server. Severity is high (CVSS 7.5). 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

How urgent is CVE-2025-20165?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

Software pages

Cisco vulnerabilities

References

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