# CVE-2026-17427: IBM Power Systems firmware denial of service via input validation

Source: https://junglewise.ai/threats/cve-2026-17427-ibm-power-systems-firmware-fw1060-00-through-fw1060-81-op940-00  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-08. Updated: 2026-11-08  
License: CC BY 4.0 with a link back

CVE-2026-17427 · Severity: medium · CVSS 6.5 · Published 2026-11-08

IBM Power Systems firmware used in enterprise servers contains a flaw in the Baseboard Management Controller (BMC) HTTPS service that allows remote attackers to crash the service without authentication. An attacker can exploit this to disable critical management access to physical systems, causing operational disruption. The vulnerability affects multiple IBM Power System models across Power 10, OpenPower 9 platforms, and the Hardware Management Console.

Technologies: [IBM Power Hardware Management Console](https://junglewise.ai/threats/technologies/power-hardware-management-console), [IBM Power Systems Firmware](https://junglewise.ai/threats/technologies/power-systems-firmware). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-17427 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-17427 being exploited in the wild.

**How severe is CVE-2026-17427?** Medium severity, with a CVSS score of 6.5, published 8 November 2026.

**Which products and versions are affected?** IBM Power Hardware Management Console OP940.00 through OP940.82; IBM Power Systems Firmware FW1060.00 through FW1060.81, OP940.00 through OP940.A2, OP910.00 through OP910.95, OP940.00 through OP940.82.

**Is there a fix for CVE-2026-17427?** Yes: fixed in FW1060.82(1060_199), OP940.A3, OP910.96, OP940.83 or newer. Until then: Protect access to the BMC network interface by operating it on a private network or restricting it behind a firewall to limit exposure to untrusted networks. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-17427 attacked?** It is attacked from the adjacent network or over the network, in device firmware.

**Am I affected by CVE-2026-17427?** Check whether you run IBM Power Hardware Management Console or IBM Power Systems Firmware 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.

## How to fix

- Fixed in FW1060.82(1060_199), OP940.A3, OP910.96, OP940.83 or newer

Protect access to the BMC network interface by operating it on a private network or restricting it behind a firewall to limit exposure to untrusted networks.

## Technical details

A reachable assertion flaw (CWE-617) in the BMC's HTTPS service results from improper input length validation, allowing remote unauthenticated attackers to trigger a denial of service. The attack requires adjacent network access to the BMC interface. The vulnerability enables crash of the management controller, potentially preventing legitimate administrators from managing affected systems.

## Affected products

- IBM Power Systems Firmware FW1060.00 through FW1060.81, OP940.00 through OP940.A2, OP910.00 through OP910.95, OP940.00 through OP940.82
- IBM Power Hardware Management Console OP940.00 through OP940.82

## Timeline

- 2026-10-28: disclosed

## References

- [https://www.ibm.com/support/pages/node/7294278](https://www.ibm.com/support/pages/node/7294278)

## Related threats

- [IBM Power Systems firmware denial of service in BMC](https://junglewise.ai/threats/cve-2026-16697-ibm-power-systems-firmware-fw1060-00-through-fw1060-81-op940-00)
- [IBM Power Systems Firmware denial of service in BMC IPMI](https://junglewise.ai/threats/cve-2026-16682-ibm-power-systems-firmware-fw1120-00-through-fw1120-01-fw1110-00)
- [IBM Power Systems Firmware resource exhaustion DoS](https://junglewise.ai/threats/cve-2026-16678-ibm-power-systems-firmware-fw1110-00-through-fw1110-31-fw1120-00)
- [IBM Power Systems Firmware CSRF in ASMI web interface](https://junglewise.ai/threats/cve-2026-18848-ibm-power-systems-firmware-csrf-in-asmi-web-interface)
- [IBM Power Systems Firmware stack-based buffer overflow in BMC interface](https://junglewise.ai/threats/cve-2026-17494-ibm-power-systems-firmware-stack-based-buffer-overflow-in-bmc)