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Full vulnerability report · 2025
CVE-2025-46706High confidence

BIG-IP iRules vulnerability

F5 · BIG-IP

8.7HighCVSS 4.0
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2025-34648

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

When an iRule containing the HTTP::respond command is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

What

When an iRule containing the HTTP::respond command is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Why

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

When an iRule containing the HTTP::respond command is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Why

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Allocation of Resources Without Limits or Throttling → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-770 ↗

CWE-770: Allocation of Resources Without Limits or Throttling. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VINoneVulnerable-system integrity: No direct loss is represented by this metric.VAHighVulnerable-system availability: A successful attack can cause a major loss.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-770
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2025-2310F5 BIG-IP und F5OS: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in F5 BIG-IP und F5 F5OS ausnutzen, um Sicherheitsmechanismen zu umgehen, seine Privilegien zu erhöhen, einen Denial-of-Service-Zustand (DoS) herbeizuführen, einen Cross-Site-Scripting-Angriff (XSS) durchzuführen und Informationen offenzulegen oder zu manipulieren, sowie um Code auszuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20251022Security Bulletin 22 Oct 2025

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 22 Oct 2025, published on 22 October 2025. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0886Multiples vulnérabilités dans les produits F5

Résumé De multiples vulnérabilités ont été découvertes dans les produits F5. Certaines d'entre elles permettent à un attaquant de provoquer une élévation de privilèges, un déni de service à distance et une atteinte à la confidentialité des données. Solutions Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité F5 K000156572 du 15 octobre 2025 https://my.f5.com/manage/s/article/K000156572 Référence CVE CVE-2025-29481 https://www.cve.org/CVERecord?id=CVE-2025-29481 Référence CVE CVE-2025-41430 https://www.cve.org/CVERecord?id=CVE-2025-41430 Référence CVE CVE-2025-46706 https://www.cve.org/CVERecord?id=CVE-2025-46706 Référence CVE CVE-2025-47148 https://www.cve.org/CVERecord?id=CVE-2025-47148 Référence CVE CVE-2025-47150 https://www.cve.org/CVERecord?id=CVE-2025-47150 Référence CVE CVE-2025-48008 https://www.cve.org/CVERecord?id=CVE-2025-48008 Référence CVE CVE-2025-53474 https://www.cve.org/CVERecord?id=CVE-2025-53474 Référence CVE CVE-2025-53521 https://www.cve.org/CVERecord?id=CVE-2025-53521 Référence CVE CVE-2025-53856 https://www.cve.org/CVERecord?id=CVE-2025-53856 Référence CVE CVE-2025-53860 https://www.cve.org/CVERecord?id=CVE-2025-53860 Référence CVE CVE-2025-53868 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2025-016928複数の F5 Networks 製品における制限またはスロットリング無しのリソースの割り当てに関する脆弱性

BIG-IP Next Cloud-Native Network Functions、BIG-IP Next SPK、BIG-IP Access Policy Manager (APM) 等複数の F5 Networks 製品には、制限またはスロットリング無しのリソースの割り当てに関する脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6618F5 제품 보안 업데이트 권고

.1.3 16.1.4 | | CVE-2025-55669 | BIG-IP ASM | 17.1.0 - 17.1.2 16.1.0 - 16.1.5 | 17.1.2.2 16.1.6 | | CVE-2025-61951 | BIG-IP (all modules) | 17.5.0 17.1.0 - 17.1.2 16.1.0 - 16.1.6 | 17.5.1 17.1.3 16.1.6.1 | | CVE-2025-55036 | BIG-IP SSL Orchestrator | 17.1.0 - 17.1.2 16.1.0 - 16.1.5 15.1.0 - 15.1.10 | 17.1.3 16.1.6 15.1.10.8 | | CVE-2025-54479 | BIG-IP PEM | 17.5.0 17.1.0 - 17.1.2 16.1.0 - 16.1.6 15.1.0 - 15.1.10 | 17.5.1 17.1.3 16.1.6.1 15.1.10.8 | | CVE-2025-54479 | BIG-IP Next CNF | 2.0.0 - 2.1.0 1.1.0 - 1.4.0 | 2.1.0 EHF-1 2.0.2 EHF-2 2.0.0 EHF-2 1.4.0 EHF-3 | | CVE-2025-54479 | BIG-IP Next for Kubernetes | 2.0.0 - 2.1.0 | 2.1.0 EHF-2 | | CVE-2025-46706 | BIG-IP (all modules) | 17.1.0 - 17.1.2 16.1.0 - 16.1.5 | 17.1.2.2 16.1.6 | | CVE-2025-46706 | BIG-IP Next SPK | 1.7.0 - 1.9.2 | 2.0.0 1.7.14 EHF-2 | | CVE-2025-46706 | BIG-IP Next CNF | 1.1.0 - 1.4.1 | 2.0.0 1.4.0 EHF-3 | | CVE-2025-59478 | BIG-IP AFM | 17.5.0 17.1.0 - 17.1.2 15.1.0 - 15.1.10 | 17.5.1 17.1.3 15.1.10.8 | | CVE-2025-61938 | BIG-IP Advanced WAF/ASM | 17.5.0 17.1.0 - 17.1.2 | 17.5.1 17.1.3 | | CVE-2025-54858 | BIG-IP Advanced WAF/ASM | 17.5.0 - 17.5.1 17.1.0 - 17.1.2 16.1.0 - 16.1.6 15.1.0 - 15.1.10 | 17.5.1.3 17.1.3 16.1.6.1 15.1.10.8 | | CVE-2025-58120 | BIG-IP Next SPK | 2.0.0 1.7.0 - 1.7.14 | 2.0.1 1.7.14 EHF-2 | | CVE-202

Official advisory ↗
NCSC-NL · Dutch · NCSC-2025-0319Kwetsbaarheden verholpen in F5 Networks BIG-IP, F5OS en NGINX App Protect WAF

Using an iRule with the HTTP::respond command on a virtual server can cause increased memory usage due to certain unspecified requests, with unsupported software versions not evaluated.

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 15 Oct 2025 · Last source change 26 Feb 2026, 16:57 UTC · CWE-770 · Allocation of Resources Without Limits or Throttling

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2025-34648
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2025-34648↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2025-46706 · cve.blacktree.nl