# CVE-2026-34176: F5 BIG-IP command injection in iControl REST Appliance mode

Source: https://junglewise.ai/threats/cve-2026-34176-f5-big-ip-command-injection-in-icontrol-rest-appliance-mode  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-13. Updated: 2026-06-29  
License: CC BY 4.0 with a link back

CVE-2026-34176 · Severity: high · CVSS 8.7 · Published 2026-05-13

F5 BIG-IP devices, which manage and secure enterprise network traffic, are vulnerable to a command injection flaw when configured in Appliance mode. An attacker with administrative credentials can execute unauthorized system commands through the management interface. This could allow a malicious actor to bypass security restrictions and gain full control over the device's operating system.

Technologies: [F5 BIG-IP](https://junglewise.ai/threats/technologies/big-ip), [F5 BIG-IP Advanced WAF](https://junglewise.ai/threats/technologies/big-ip-advanced-waf), [F5 Big-Ip Access Policy Manager](https://junglewise.ai/threats/technologies/big-ip-access-policy-manager), [F5 Big-Ip Advanced Firewall Manager](https://junglewise.ai/threats/technologies/big-ip-advanced-firewall-manager), [F5 Big-Ip Local Traffic Manager](https://junglewise.ai/threats/technologies/big-ip-local-traffic-manager). Vendors: [F5](https://junglewise.ai/threats/vendors/f5).

## Quick answers

**Is CVE-2026-34176 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34176 being exploited in the wild.

**How severe is CVE-2026-34176?** High severity, with a CVSS score of 8.7, published 13 May 2026.

**Which products and versions are affected?** F5 BIG-IP Not specified (Appliance mode enabled); F5 BIG-IP Advanced WAF 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0; F5 Big-Ip Access Policy Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0; F5 Big-Ip Advanced Firewall Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0; and 1 more.

**Is there a fix for CVE-2026-34176?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-34176 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-34176?** Check whether you run F5 BIG-IP, F5 BIG-IP Advanced WAF, F5 Big-Ip Access Policy Manager or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An authenticated remote command injection vulnerability (CWE-78) exists in an undisclosed iControl REST endpoint within F5 BIG-IP. The vulnerability is specific to devices running in 'Appliance mode,' a restricted configuration intended to limit administrative access to the underlying operating system. An attacker with high-privileged credentials can exploit this flaw via the network to execute arbitrary OS commands. This allows the attacker to cross the security boundary established by Appliance mode, potentially leading to full system compromise. The issue affects multiple BIG-IP modules including LTM, APM, and AFM across versions 16.1.x, 17.5.x, and 21.0.x.

## Affected products

- F5 BIG-IP Access Policy Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0
- F5 BIG-IP Advanced Firewall Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0
- F5 BIG-IP Advanced WAF 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0
- F5 BIG-IP Local Traffic Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0

## Timeline

- 2026-05-13: advisory: Initial publication of the vulnerability advisory

## References

- [https://my.f5.com/manage/s/article/K000160857](https://my.f5.com/manage/s/article/K000160857)

## Related threats

- [F5 BIG-IP privilege escalation in TMUI](https://junglewise.ai/threats/cve-2026-66842-f5-big-ip-privilege-escalation-in-tmui)
- [F5 BIG-IP Configuration utility error message spoofing](https://junglewise.ai/threats/cve-2026-63020-f5-big-ip-configuration-utility-error-message-spoofing)
- [F5 BIG-IP denial of service in HTTP/2 profile memory management](https://junglewise.ai/threats/cve-2026-59762-f5-big-ip-denial-of-service-in-http-2-profile-memory-management)
- [F5 BIG-IP and BIG-IQ incorrect permission assignment in tmsh and iControl REST](https://junglewise.ai/threats/cve-2026-42937-f5-big-ip-and-big-iq-incorrect-permission-assignment-in-tmsh-and)
- [F5 BIG-IP Appliance mode restriction bypass via path traversal](https://junglewise.ai/threats/cve-2026-42930-f5-big-ip-appliance-mode-restriction-bypass-via-path-traversal)