CVE-2025-61938Network attack vector

Service interruption via oversized Data Guard URL

Published Oct 15, 2025 · Updated Oct 15, 2025

Denial of service in F5 BIG-IP 17.1.0 through 17.1.2 and 17.5.0 allows remote attackers to repeatedly terminate the bd process. Advanced WAF or ASM accepts a Data Guard Protection Enforcement URL longer than 1024 characters in a security policy and enters a bd restart loop. Exploitation requires that policy setting, created manually or by Policy Builder; the resulting loop repeatedly interrupts the WAF or ASM service.

CVSS severity8.7
High
EPSS probability0.35%
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

Denial of service in F5 BIG-IP 17.1.0 through 17.1.2 and 17.5.0 allows remote attackers to repeatedly terminate the bd process. Advanced WAF or ASM accepts a Data Guard Protection Enforcement URL longer than 1024 characters in a security policy and enters a bd restart loop. Exploitation requires that policy setting, created manually or by Policy Builder; the resulting loop repeatedly interrupts the WAF or ASM service.

The record

CVE
CVE-2025-61938
Published
Oct 15, 2025
Updated
Oct 15, 2025
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-1284, 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=17.1.0 <17.1.3
  2. Affected versionversion=17.5.0 <17.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

F5 Networks · BIG-IPversion=17.1.0 <17.1.3; version=17.5.0 <17.5.1

Published CVSS scores

8.7F5 NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5F5 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-1284Improper Validation of Specified Quantity in Input
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