How severe is CVE-2026-20916?

CVE-2026-20916 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-20916 being actively exploited?

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

What products are affected by CVE-2026-20916?

CVE-2026-20916 affects F5 Big-iq Centralized Management. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-20916?

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-2026-20916 have an EU (EUVD) identifier?

Yes. CVE-2026-20916 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29957.

When was CVE-2026-20916 published?

CVE-2026-20916 was published on 2026-05-13 and last updated on 2026-06-29.

CVE-2026-20916

CVE-2026-20916 is a high-severity vulnerability in F5 Big-iq Centralized Management 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-22.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v4: 7.2
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29957
Weakness: CWE-22
Affected product: F5 Big-iq Centralized Management
Published: 2026-05-13
Last modified: 2026-06-29

Description

An authenticated iControl REST user with low privileges can create or modify arbitrary files through an undisclosed iControl REST endpoint on the BIG-IQ system. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Frequently asked questions

What is CVE-2026-20916?: An authenticated iControl REST user with low privileges can create or modify arbitrary files through an undisclosed iControl REST endpoint on the BIG-IQ system. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
How severe is CVE-2026-20916?: CVE-2026-20916 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-20916 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20916?: CVE-2026-20916 affects F5 Big-iq Centralized Management. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-20916?: 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-2026-20916 have an EU (EUVD) identifier?: Yes. CVE-2026-20916 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29957.
When was CVE-2026-20916 published?: CVE-2026-20916 was published on 2026-05-13 and last updated on 2026-06-29.

References

https://my.f5.com/manage/s/article/K000158029

Affected products (1)

cpe:2.3:a:f5:big-iq_centralized_management:8.4.0:*:*:*:*:*:*:*

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