CVE-2022-41806Network attack vector

Unauthenticated denial of service via NAT64 memory exhaustion

Published Oct 19, 2022 · Updated May 8, 2025

Resource exhaustion in F5 BIG-IP AFM 15.1.x before 15.1.5.1 and 16.1.x before 16.1.3.2 allows remote attackers to interrupt service. F5 identifies the affected locus as NAT64 request processing when an AFM Network Address Translation policy has IPv6/IPv4 translation rules, but has not disclosed the triggering request pattern or exact memory-management error. No authentication or user interaction is required; the condition increases memory utilization and can interrupt affected traffic processing.

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

What happened

Resource exhaustion in F5 BIG-IP AFM 15.1.x before 15.1.5.1 and 16.1.x before 16.1.3.2 allows remote attackers to interrupt service. F5 identifies the affected locus as NAT64 request processing when an AFM Network Address Translation policy has IPv6/IPv4 translation rules, but has not disclosed the triggering request pattern or exact memory-management error. No authentication or user interaction is required; the condition increases memory utilization and can interrupt affected traffic processing.

The record

CVE
CVE-2022-41806
Published
Oct 19, 2022
Updated
May 8, 2025
Vendor
F5 Networks
Product
BIG-IP Advanced Firewall Manager
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 19, 2022CVE publishedPublication date reported by the CVE source.
  2. May 8, 2025Record 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=15.1.x <15.1.5.1
  2. Affected versionversion=16.1.x <16.1.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

F5 Networks · BIG-IP Advanced Firewall Managerversion=15.1.x <15.1.5.1; version=16.1.x <16.1.3.2

Published CVSS scores

7.5F5 NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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-400Uncontrolled Resource Consumption
T1499.004Application 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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