CVE-2023-22842Network attack vector

Unauthenticated TMM termination via SIP stack overflow

Published Feb 1, 2023 · Updated Mar 26, 2025

Stack-based buffer overflow in F5 BIG-IP allows remote attackers to terminate TMM through undisclosed traffic sent to a SIP-enabled virtual server. The flaw lies in SIP processing by the Traffic Management Microkernel, but F5 has not disclosed the specific stack operation or traffic pattern that triggers the overflow. The network path exists only when a SIP profile is configured on a Message Routing virtual server, and exploitation interrupts traffic processing by crashing TMM.

CVSS severity7.5
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in F5 BIG-IP allows remote attackers to terminate TMM through undisclosed traffic sent to a SIP-enabled virtual server. The flaw lies in SIP processing by the Traffic Management Microkernel, but F5 has not disclosed the specific stack operation or traffic pattern that triggers the overflow. The network path exists only when a SIP profile is configured on a Message Routing virtual server, and exploitation interrupts traffic processing by crashing TMM.

The record

CVE
CVE-2023-22842
Published
Feb 1, 2023
Updated
Mar 26, 2025
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-121, CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 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=13.1.0 <*
  2. Affected versionversion=14.1.0 <14.1.5.3
  3. Affected versionversion=15.1.0 <15.1.8.1
  4. Affected versionversion=16.1.0 <16.1.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

F5 Networks · BIG-IPversion=13.1.0 <*; version=14.1.0 <14.1.5.3; version=15.1.0 <15.1.8.1; version=16.1.0 <16.1.3.3

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-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
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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