How severe is CVE-2025-36546?

CVE-2025-36546 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-36546 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-36546?

CVE-2025-36546 primarily affects F5 F5os-a. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-36546?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-36546 have an EU (EUVD) identifier?

Yes. CVE-2025-36546 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-13944.

When was CVE-2025-36546 published?

CVE-2025-36546 was published on 2025-05-07 and last updated on 2026-06-17.

CVE-2025-36546

CVE-2025-36546 is a high-severity vulnerability in F5 F5os-a with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v4: 9.2
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-13944
Weakness: CWE-863
Affected product: F5 F5os-a
Published: 2025-05-07
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2025-36546?: CVE-2025-36546 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-36546 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-36546?: CVE-2025-36546 primarily affects F5 F5os-a. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-36546?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-36546 have an EU (EUVD) identifier?: Yes. CVE-2025-36546 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-13944.
When was CVE-2025-36546 published?: CVE-2025-36546 was published on 2025-05-07 and last updated on 2026-06-17.

References

https://my.f5.com/manage/s/article/K000140574

Affected products (2)

cpe:2.3:o:f5:f5os-a:*:*:*:*:*:*:*:*
cpe:2.3:o:f5:f5os-c:*:*:*:*:*:*:*:*

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