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% (29th 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% (29th 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% (29th 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:*:*:*:*:*:*:*

More vulnerabilities in F5 Big-iq Centralized Management

CVE-2021-22986 — Critical (CVSS 9.8): On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and…
CVE-2020-5868 — Critical (CVSS 9.8): In BIG-IQ 6.0.0-7.0.0, a remote access vulnerability has been discovered that may allow a remote user to execute shell…
CVE-2016-5022 — Critical (CVSS 9.8): F5 BIG-IP LTM, Analytics, APM, ASM, and Link Controller 11.2.x before 11.2.1 HF16, 11.3.x, 11.4.x, 11.5.x before 11.5.4…
CVE-2019-6665 — Critical (CVSS 9.4): On BIG-IP ASM 15.0.0-15.0.1, 14.1.0-14.1.2, 14.0.0-14.0.1, and 13.1.0-13.1.3.1, BIG-IQ 6.0.0 and 5.2.0-5.4.0, iWorkflow…
CVE-2021-23005 — Critical (CVSS 9.1): On all 7.x and 6.x versions (fixed in 8.0.0), when using a Quorum device for BIG-IQ high availability (HA) for…
CVE-2020-5869 — Critical (CVSS 9.1): In BIG-IQ 5.2.0-7.0.0, high availability (HA) synchronization is not secure by TLS and may allow on-path attackers to…

All CVEs affecting F5 Big-iq Centralized Management →

Other CWE-22 (Path Traversal) vulnerabilities

CVE-2026-48282 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Limitation of a Pathname to a Restricted…
CVE-2026-54917 — Critical (CVSS 10.0): SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the…
CVE-2026-11429 — Critical (CVSS 10.0): Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file…
CVE-2026-34909 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to…
CVE-2026-7411 — Critical (CVSS 10.0): In Eclipse BaSyx Java Server SDK versions prior to 2.0.0-milestone-10, inadequate path normalization in the Submodel…
CVE-2026-36767 — Critical (CVSS 10.0): A path traversal vulnerability in the /content/images/add endpoint of shopizer v3.2.5 allows attackers write arbitrary…

Browse all CWE-22 (Path Traversal) vulnerabilities →