CVE-2022-41787Network attack vector

Unauthenticated TMM termination via DNSSEC queries

Published Oct 19, 2022 · Updated May 6, 2025

NULL pointer dereference in affected F5 BIG-IP DNS and LTM versions allows remote attackers to terminate TMM with DNSSEC queries. TMM processes an undisclosed class of DNSSEC queries and dereferences a null pointer, terminating the traffic management process. The unauthenticated path exists only on a virtual server with a DNS profile and DNS Express enabled, and successful requests interrupt traffic handled by TMM.

CVSS severity7.5
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

NULL pointer dereference in affected F5 BIG-IP DNS and LTM versions allows remote attackers to terminate TMM with DNSSEC queries. TMM processes an undisclosed class of DNSSEC queries and dereferences a null pointer, terminating the traffic management process. The unauthenticated path exists only on a virtual server with a DNS profile and DNS Express enabled, and successful requests interrupt traffic handled by TMM.

The record

CVE
CVE-2022-41787
Published
Oct 19, 2022
Updated
May 6, 2025
Vendor
F5 Networks
Product
BIG-IP DNS
Classifications
CWE-476, T1499.008
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 19, 2022CVE publishedPublication date reported by the CVE source.
  2. May 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=13.1.x <13.1.5.1
  2. Affected versionversion=14.1.x <14.1.5.1
  3. Affected versionversion=15.1.x <15.1.6.1
  4. Affected versionversion=16.1.x <16.1.3.1
  5. Affected versionversion=17.0.x <17.0.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

F5 Networks · BIG-IP DNSversion=13.1.x <13.1.5.1; version=14.1.x <14.1.5.1; version=15.1.x <15.1.6.1; version=16.1.x <16.1.3.1; version=17.0.x <17.0.0.1
F5 Networks · BIG-IP LTMversion=13.1.x <13.1.5.1; version=14.1.x <14.1.5.1; version=15.1.x <15.1.6.1; version=16.1.x <16.1.3.1; version=17.0.x <17.0.0.1

Published CVSS scores

7.5F5 NetworksCVSS: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
T1499.008Network Device 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo