How severe is CVE-2026-42780?

CVE-2026-42780 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-42780 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42780?

CVE-2026-42780 primarily affects F5 Big-ip Ssl Orchestrator. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-42780?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-42780 have an EU (EUVD) identifier?

Yes. CVE-2026-42780 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30001.

When was CVE-2026-42780 published?

CVE-2026-42780 was published on 2026-05-13 and last updated on 2026-06-23.

CVE-2026-42780

CVE-2026-42780 is a medium-severity vulnerability in F5 Big-ip Ssl Orchestrator with a CVSS 3.x base score of 4.9. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
CVSS v4: 6.9
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30001
Weakness: CWE-22
Affected product: F5 Big-ip Ssl Orchestrator
Published: 2026-05-13
Last modified: 2026-06-23

Description

A directory traversal vulnerability exists in BIG-IP SSL Orchestrator that allows an authenticated attacker with high privilege to overwrite, delete or corrupt arbitrary local files. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Frequently asked questions

What is CVE-2026-42780?: A directory traversal vulnerability exists in BIG-IP SSL Orchestrator that allows an authenticated attacker with high privilege to overwrite, delete or corrupt arbitrary local files. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
How severe is CVE-2026-42780?: CVE-2026-42780 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-42780 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42780?: CVE-2026-42780 primarily affects F5 Big-ip Ssl Orchestrator. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-42780?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42780 have an EU (EUVD) identifier?: Yes. CVE-2026-42780 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30001.
When was CVE-2026-42780 published?: CVE-2026-42780 was published on 2026-05-13 and last updated on 2026-06-23.

References

https://my.f5.com/manage/s/article/K000149743

Affected products (2)

cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_ssl_orchestrator:21.0.0:*:*:*:*:*:*:*

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