CVE-2023-41085Network attack vector

Remote TMM termination via IPsec traffic

Published Oct 10, 2023 · Updated Sep 19, 2024

Denial of service in affected F5 BIG-IP releases allows remote attackers to terminate TMM via traffic to an IPsec virtual server. An IPsec-enabled virtual server passes undisclosed network traffic into TMM, where improper handling of an exceptional condition terminates the process. The configuration must enable IPsec on a virtual server; F5 has not disclosed the triggering traffic, and the reported consequence is a traffic-management service interruption.

CVSS severity7.5
High
EPSS probability0.52%
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 via traffic to an IPsec virtual server. An IPsec-enabled virtual server passes undisclosed network traffic into TMM, where improper handling of an exceptional condition terminates the process. The configuration must enable IPsec on a virtual server; F5 has not disclosed the triggering traffic, and the reported consequence is a traffic-management service interruption.

The record

CVE
CVE-2023-41085
Published
Oct 10, 2023
Updated
Sep 19, 2024
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-755, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 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=13.1.0 <*
  2. Affected versionversion=14.1.0 <*
  3. Affected versionversion=15.1.0 <15.1.9
  4. Affected versionversion=16.1.0 <16.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

F5 Networks · BIG-IPversion=13.1.0 <*; version=14.1.0 <*; version=15.1.0 <15.1.9; version=16.1.0 <16.1.4

Published CVSS scores

7.5F5CVSS: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-755Improper Handling of Exceptional Conditions
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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