F5 vulnerabilities in CISA KEV
F5 has 8 vulnerabilities in CISA's catalogue of flaws known to be exploited, the 32nd highest of any vendor. 2 were added in the last 12 months; 4 are linked to known ransomware use (50% of its entries, against 20.4% across the catalogue). CISA's median fix window for these entries is 17.5 days (range 3 to 181), against 21 days (range 1 to 184) across the whole catalogue. The most exploited product is BIG-IP, with 3 entries. Other frequently affected products: BIG-IP Configuration Utility (2); BIG-IP and BIG-IQ Centralized Management (1).
Catalog v2026.11.04, released 5 Nov 2026. Source CISA ↗. All KEV entries.
$ ./kev --vendor f5 --summary
Counts are computed from the catalog release on ; the 12 month window ends there.
┌─ total entries
8
in CISA KEV
┌─ first added
2021-11-03
earliest entry
┌─ latest added
2026-09-22
most recent entry
┌─ last 12 months
2
entries added
┌─ ransomware use
4 of 8
50% linked to ransomware
┌─ distinct products
5
affected products
$ awk -F, {print $1} /var/log/kev/f5.log | uniq -c
Entries by the year CISA added them.
| Year | Entries added | Of which ransomware |
|---|---|---|
| 2021 | 2 | 2 |
| 2022 | 2 | 1 |
| 2023 | 2 | 1 |
| 2026 | 2 | 0 |
$ sort /var/log/kev/f5.log | uniq -c | sort -rn | head -5
The five products with the most entries in the catalogue.
- BIG-IP 3 entries
- BIG-IP Configuration Utility 2 entries
- BIG-IP and BIG-IQ Centralized Management 1 entry
- BIG-IP APM 1 entry
- BIG-IP Traffic Management Microkernel 1 entry
$ kev-due-dates --vendor f5
Days between the date CISA added an entry and the due date it set, median and range. Due dates apply to US federal agencies; for everyone else they are a patch-first ranking signal.
┌─ F5
17.5 days (range 3 to 181)
median and range in days
┌─ whole catalogue
21 days (range 1 to 184)
median and range in days
$ grep -o 'CWE-[0-9]*' /var/log/kev/f5.log | sort | uniq -c | sort -rn | head -3
Weakness types CISA records for these entries (8 of 8 have at least one CWE).
$ grep -ril 'F5' /var/log/news | head -5
Our reporting that names F5 or one of its KEV CVE ids, newest first.
┌─ /var/log/news
Patch Week pages with these entries
$ wc -l ./f5.kev · 8 rows
Descriptions: CISA Known Exploited Vulnerabilities catalogue
- CVE-2026-94127
BIG-IP APM
F5 BIG-IP APM Heap-based Buffer Overflow Vulnerability
due 2026-09-25 · CWE-122
$ cat CVE-2026-94127.txt
Description. F5 BIG-IP APM contains a heap-based buffer overflow vulnerability when access policy and an OAuth profile are configured on a virtual server. This vulnerability could allow an unauthenticated attacker to perform remote code execution.
Required action. Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- CVE-2025-53521
BIG-IP
F5 BIG-IP Stack-Based Buffer Overflow Vulnerability
due 2026-03-30 · CWE-121
$ cat CVE-2025-53521.txt
Description. F5 BIG-IP APM contains a stack-based buffer overflow vulnerability that could allow a threat actor to achieve remote code execution.
Required action. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CVE-2023-46747
BIG-IP Configuration Utility [RANSOMWARE]
F5 BIG-IP Configuration Utility Authentication Bypass Vulnerability
due 2023-11-21 · CWE-288
$ cat CVE-2023-46747.txt
Description. F5 BIG-IP Configuration utility contains an authentication bypass using an alternate path or channel vulnerability due to undisclosed requests that may allow an unauthenticated attacker with network access to the BIG-IP system through the management port and/or self IP addresses to execute system commands. This vulnerability can be used in conjunction with CVE-2023-46748.
Required action. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CVE-2023-46748
BIG-IP Configuration Utility
F5 BIG-IP Configuration Utility SQL Injection Vulnerability
due 2023-11-21 · CWE-89
$ cat CVE-2023-46748.txt
Description. F5 BIG-IP Configuration utility contains an SQL injection vulnerability that may allow an authenticated attacker with network access through the BIG-IP management port and/or self IP addresses to execute system commands. This vulnerability can be used in conjunction with CVE-2023-46747.
Required action. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CVE-2022-1388
BIG-IP [RANSOMWARE]
F5 BIG-IP Missing Authentication Vulnerability
due 2022-05-31 · CWE-306
$ cat CVE-2022-1388.txt
Description. F5 BIG-IP contains a missing authentication in critical function vulnerability which can allow for remote code execution, creation or deletion of files, or disabling services.
Required action. Apply updates per vendor instructions.
- CVE-2021-22991
BIG-IP Traffic Management Microkernel
F5 BIG-IP Traffic Management Microkernel Buffer Overflow
due 2022-02-01 · CWE-119
$ cat CVE-2021-22991.txt
Description. The Traffic Management Microkernel of BIG-IP ASM Risk Engine has a buffer overflow vulnerability, leading to a bypassing of URL-based access controls.
Required action. Apply updates per vendor instructions.
- CVE-2020-5902
BIG-IP [RANSOMWARE]
F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution Vulnerability
due 2022-05-03 · CWE-22
$ cat CVE-2020-5902.txt
Description. F5 BIG-IP Traffic Management User Interface (TMUI) contains a remote code execution vulnerability in undisclosed pages.
Required action. Apply updates per vendor instructions.
- CVE-2021-22986
BIG-IP and BIG-IQ Centralized Management [RANSOMWARE]
F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution Vulnerability
due 2021-11-17 · CWE-863
$ cat CVE-2021-22986.txt
Description. F5 BIG-IP and BIG-IQ Centralized Management contain a remote code execution vulnerability in the iControl REST interface that allows unauthenticated attackers with network access to execute system commands, create or delete files, and disable services.
Required action. Apply updates per vendor instructions.