Unauthenticated service interruption via High-Speed Bridge lockup
Published Oct 15, 2025 · Updated Oct 15, 2025
Improper locking in F5 BIG-IP hardware with an HSB allows remote attackers to interrupt service via undisclosed network traffic. Under undisclosed traffic conditions, the High-Speed Bridge enters a locked state instead of continuing to process packets; F5 has not published the specific locking operation or traffic pattern. Exploitation requires no authentication or user interaction, but depends on conditions beyond the attacker's control and affects only hardware platforms that contain an HSB.
Summary
What happened
Improper locking in F5 BIG-IP hardware with an HSB allows remote attackers to interrupt service via undisclosed network traffic. Under undisclosed traffic conditions, the High-Speed Bridge enters a locked state instead of continuing to process packets; F5 has not published the specific locking operation or traffic pattern. Exploitation requires no authentication or user interaction, but depends on conditions beyond the attacker's control and affects only hardware platforms that contain an HSB.
The record
- CVE
- CVE-2025-58153
- Published
- Oct 15, 2025
- Updated
- Oct 15, 2025
- Vendor
- F5 Networks
- Product
- BIG-IP
- Classifications
- CWE-667, CAPEC-25, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 15, 2025CVE publishedPublication date reported by the CVE source.
- Oct 15, 2025Record 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.
- Affected versionversion=15.1.0 <15.1.10.8
- Affected versionversion=16.1.0 <16.1.6.1
- Affected versionversion=17.5.0 <17.5.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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