CVE-2025-48008Network attack vector

TMM termination via MPTCP use-after-free

Published Oct 15, 2025 · Updated Oct 15, 2025

Use-after-free in F5 BIG-IP products allows remote attackers to terminate TMM by sending traffic to an MPTCP-enabled virtual server. The Traffic Management Microkernel references memory after it has been freed while handling undisclosed traffic on an MPTCP-enabled TCP profile. Exploitation requires that configuration and additional conditions beyond the attacker's control; the documented consequence is a TMM process termination that interrupts traffic processing.

CVSS severity8.7
High
EPSS probability0.44%
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

Use-after-free in F5 BIG-IP products allows remote attackers to terminate TMM by sending traffic to an MPTCP-enabled virtual server. The Traffic Management Microkernel references memory after it has been freed while handling undisclosed traffic on an MPTCP-enabled TCP profile. Exploitation requires that configuration and additional conditions beyond the attacker's control; the documented consequence is a TMM process termination that interrupts traffic processing.

The record

CVE
CVE-2025-48008
Published
Oct 15, 2025
Updated
Oct 15, 2025
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 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=15.1.0 <15.1.10.8
  2. Affected versionversion=16.1.0 <16.1.6
  3. Affected versionversion=17.1.0 <17.1.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

F5 Networks · BIG-IPversion=15.1.0 <15.1.10.8; version=16.1.0 <16.1.6; version=17.1.0 <17.1.2.2
F5 Networks · BIG-IP Next CNFversion=1.1.0 <*
F5 Networks · BIG-IP Next SPKversion=1.7.0 <*

Published CVSS scores

8.7F5CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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-416Use After Free
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

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