CVE-2022-23020Network attack vector

Unauthenticated TMM termination via malformed logging request

Published Jan 25, 2022 · Updated Aug 3, 2024

BIG-IP 16.1.x before 16.1.2 allows remote attackers to cause a service interrupt via crafted requests when Request Logging responds on error. The TMM request-logging path mishandles an undisclosed request while the Respond on Error setting is enabled and the profile is attached to a virtual server, causing the Traffic Management Microkernel to terminate. No authentication or user interaction is required, but the logging profile and virtual-server configuration must be present; the reported consequence is denial of service without confidentiality or integrity impact.

CVSS severity7.5
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

BIG-IP 16.1.x before 16.1.2 allows remote attackers to cause a service interrupt via crafted requests when Request Logging responds on error. The TMM request-logging path mishandles an undisclosed request while the Respond on Error setting is enabled and the profile is attached to a virtual server, causing the Traffic Management Microkernel to terminate. No authentication or user interaction is required, but the logging profile and virtual-server configuration must be present; the reported consequence is denial of service without confidentiality or integrity impact.

The record

CVE
CVE-2022-23020
Published
Jan 25, 2022
Updated
Aug 3, 2024
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-476, T1499
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 16.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

F5 Networks · BIG-IPversion=16.1.x before 16.1.2

Published CVSS scores

7.1NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:C
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.

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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
T1499Endpoint Denial of Service

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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