CVE-2025-46706Network attack vector

Unauthenticated service interruption via unbounded request memory

Published Oct 15, 2025 · Updated Feb 26, 2026

Resource exhaustion in F5 BIG-IP products allows remote attackers to interrupt service through undisclosed requests. With an HTTP::respond iRule attached to a virtual server, request handling increases memory utilization without an effective resource limit; F5 has not disclosed the triggering request pattern or code-level operation. The affected rule must be active, and unauthenticated network requests can exhaust memory and disrupt availability without reading or modifying data.

CVSS severity8.7
High
EPSS probability0.43%
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 products allows remote attackers to interrupt service through undisclosed requests. With an HTTP::respond iRule attached to a virtual server, request handling increases memory utilization without an effective resource limit; F5 has not disclosed the triggering request pattern or code-level operation. The affected rule must be active, and unauthenticated network requests can exhaust memory and disrupt availability without reading or modifying data.

The record

CVE
CVE-2025-46706
Published
Oct 15, 2025
Updated
Feb 26, 2026
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-770, T1499
Attack vector
network
Privileges
unauthenticated

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=16.1.0 <16.1.6
  2. 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=16.1.0 <16.1.6; version=17.1.0 <17.1.2.2
F5 Networks · BIG-IP Next CNFversion=1.1.0 <* changes=[{"at":"1.4.0-EHF-3","status":"unaffected"}]
F5 Networks · BIG-IP Next SPKversion=1.7.0 <* changes=[{"at":"1.7.14-EHF-2","status":"unaffected"}]

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-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

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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