CVE-2025-47148Network attack vector

Authenticated service interruption via SAML memory exhaustion

Published Oct 15, 2025 · Updated Feb 26, 2026

Resource exhaustion in F5 BIG-IP APM, SWG, and SSLO allows remote authenticated users to interrupt service through SAML logout requests. F5 has not disclosed the request form or code locus; affected requests leave memory resources unreleased and increase utilization. Reachability requires one system to act as both a SAML service provider and identity provider with single logout enabled on an access policy.

CVSS severity7.1
High
EPSS probability0.39%
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 APM, SWG, and SSLO allows remote authenticated users to interrupt service through SAML logout requests. F5 has not disclosed the request form or code locus; affected requests leave memory resources unreleased and increase utilization. Reachability requires one system to act as both a SAML service provider and identity provider with single logout enabled on an access policy.

The record

CVE
CVE-2025-47148
Published
Oct 15, 2025
Updated
Feb 26, 2026
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-404, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record 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=15.1.0 <15.1.10.8
  2. Affected versionversion=16.1.0 <16.1.6.1
  3. Affected versionversion=17.1.0 <17.1.3
  4. Affected versionversion=17.5.0 <17.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

F5 Networks · BIG-IPversion=15.1.0 <15.1.10.8; version=16.1.0 <16.1.6.1; version=17.1.0 <17.1.3; version=17.5.0 <17.5.1

Published CVSS scores

6.5F5 NetworksCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1F5 NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
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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