CVE-2025-58424Network attack vector

Unauthenticated modification of unprotected protocol data

Published Oct 15, 2025 · Updated Oct 15, 2025

Predictable number generation in F5 BIG-IP allows remote attackers to corrupt or modify data in protocols without message integrity. F5 identifies TMM as the affected component but has not disclosed the crafted traffic or the operation that handles predictable values incorrectly. Exploitation requires network access and a protocol without message integrity; no authentication or user interaction is required, and the reported impact is limited to data integrity.

CVSS severity6.3
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Predictable number generation in F5 BIG-IP allows remote attackers to corrupt or modify data in protocols without message integrity. F5 identifies TMM as the affected component but has not disclosed the crafted traffic or the operation that handles predictable values incorrectly. Exploitation requires network access and a protocol without message integrity; no authentication or user interaction is required, and the reported impact is limited to data integrity.

The record

CVE
CVE-2025-58424
Published
Oct 15, 2025
Updated
Oct 15, 2025
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-340, T1565.002
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

Published CVSS scores

6.3F5 NetworksCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
5.3F5 NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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-340Generation of Predictable Numbers or Identifiers
T1565.002Transmitted Data Manipulation

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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