How severe is CVE-2025-55036?

CVE-2025-55036 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-55036 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-55036?

CVE-2025-55036 affects F5 Big-ip Ssl Orchestrator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-55036?

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-2025-55036 have an EU (EUVD) identifier?

Yes. CVE-2025-55036 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34645.

When was CVE-2025-55036 published?

CVE-2025-55036 was published on 2025-10-15 and last updated on 2026-06-17.

CVE-2025-55036

CVE-2025-55036 is a high-severity vulnerability in F5 Big-ip Ssl Orchestrator with a CVSS 3.x base score of 7.5. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-34645
Weakness: CWE-787
Affected product: F5 Big-ip Ssl Orchestrator
Published: 2025-10-15
Last modified: 2026-06-17

Description

When BIG-IP SSL Orchestrator explicit forward proxy is configured on a virtual server and the proxy connect feature is enabled, undisclosed traffic may cause memory corruption. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Frequently asked questions

What is CVE-2025-55036?: When BIG-IP SSL Orchestrator explicit forward proxy is configured on a virtual server and the proxy connect feature is enabled, undisclosed traffic may cause memory corruption. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
How severe is CVE-2025-55036?: CVE-2025-55036 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-55036 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-55036?: CVE-2025-55036 affects F5 Big-ip Ssl Orchestrator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-55036?: 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-2025-55036 have an EU (EUVD) identifier?: Yes. CVE-2025-55036 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34645.
When was CVE-2025-55036 published?: CVE-2025-55036 was published on 2025-10-15 and last updated on 2026-06-17.

References

https://my.f5.com/manage/s/article/K000151368

Affected products (1)

cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:*

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