Vulnerability · CVE-2025-36546
On an F5OS system, if the root user had previously configured the system to allow login via SSH key-based authentication, and then enabled Appliance Mode; access via SSH key-based
Published May 7, 2025 · catalog updated Feb 26, 2026 · F5 F5OS - Appliance
Check if you run it
No confirmed exploitation is on record for CVE-2025-36546. EPSS is 0.44%. Act only if a listed version of F5 F5OS - Appliance is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Critical9.2
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.44%
- Remediation
- Version ranges on file
- Affected products
- vendor F5 F5OS - Appliance 1.7.0 <1.8.0
On an F5OS system, if the root user had previously configured the system to allow login via SSH key-based authentication, and then enabled Appliance Mode; access via SSH key-based authentication is still allowed. For an attacker to exploit this vulnerability they must obtain the root user's SSH private key. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor F5 F5OS - Appliance 1.7.0 <1.8.01.7.0 <1.8.0
How to fix CVE-2025-36546
Recommended remediation
Affected version ranges suggest a fixed boundary. Verify against the vendor advisory for your release.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-36546. EPSS is 0.44%. Act only if a listed version of F5 F5OS - Appliance is installed.
Which versions are affected?
Compare what you have installed with F5 F5OS - Appliance 1.7.0 <1.8.0 1.7.0 <1.8.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.44%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
May 7, 2025 · EUVD
Detected
On an F5OS system, if the root user had previously configured the system to allow login via SSH key-based authentication, and then enabled Appliance Mode; access via SSH key-based authentication is still allowed. For an attacker to exploit this vulnerability they must obtain the root user's SSH private key. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluate
Feb 26, 2026 · EUVD
Updated
On an F5OS system, if the root user had previously configured the system to allow login via SSH key-based authentication, and then enabled Appliance Mode; access via SSH key-based authentication is still allowed. For an attacker to exploit this vulnerability they must obtain the root user's SSH private key. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluate
Sources
- CVE.orgVulnerability recordCVE-2025-36546
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-36546
30-day exploitation probability 0.4%
first.org - EUVDVulnerability recordEUVD-2025-13944
On an F5OS system, if the root user had previously configured the system to allow login via SSH key-based authentication, and then enabled Appliance Mode; access via SSH key-based authentication is still allowed. For an attacker to exploit this vulnerability they must obtain the
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.