CVE-2022-23025Network attack vector

Unauthenticated TMM termination via SIP ALG requests

Published Jan 25, 2022 · Updated Aug 3, 2024

Denial of service in affected F5 BIG-IP releases allows remote attackers to terminate TMM through requests to a SIP virtual server. The published CWE mapping identifies a null pointer dereference in the SIP ALG path, but F5 has not disclosed the exact parsing operation or input field. The condition requires a SIP ALG profile and affects 16.1.x before 16.1.1, 15.1.x before 15.1.4, 14.1.x before 14.1.4.4, and all 13.1.x releases, interrupting traffic without reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected F5 BIG-IP releases allows remote attackers to terminate TMM through requests to a SIP virtual server. The published CWE mapping identifies a null pointer dereference in the SIP ALG path, but F5 has not disclosed the exact parsing operation or input field. The condition requires a SIP ALG profile and affects 16.1.x before 16.1.1, 15.1.x before 15.1.4, 14.1.x before 14.1.4.4, and all 13.1.x releases, interrupting traffic without reported data disclosure or modification.

The record

CVE
CVE-2022-23025
Published
Jan 25, 2022
Updated
Aug 3, 2024
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=16.1.x before 16.1.1, 15.1.x before 15.1.4, 14.1.x before 14.1.4.4, and all versions of 13.1.x

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

F5 Networks · BIG-IPversion=16.1.x before 16.1.1, 15.1.x before 15.1.4, 14.1.x before 14.1.4.4, and all versions of 13.1.x

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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