Is CVE-2026-16687 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-16687 being exploited in the wild.

How severe is CVE-2026-16687?

Critical severity, with a CVSS score of 9.6, published 19 August 2026.

Which products and versions are affected?

IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2.

Is there a fix for CVE-2026-16687?

A patch was published on 2026-08-15: Patches released: FW1120.01 (Power 11), FW1060.81 (Power 10), FW950.H3 (Power 9) Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-16687 attacked?

It is attacked over the network.

Am I affected by CVE-2026-16687?

Check whether you run 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.

CVE-2026-16687: IBM Power Systems Firmware stack buffer overflow in ASMI web interface

CVE-2026-16687 · Severity: critical · CVSS 9.6 · Published 2026-08-19

IBM Power Systems firmware runs the Advanced System Management Interface (ASMI), a web-based management tool for controlling enterprise server systems. An unauthenticated attacker on the network can send a malformed request to trigger a stack-based buffer overflow, allowing them to execute arbitrary code and gain complete control of the affected server, compromising all data and services running on it.

Technologies: IBM Power Systems Firmware. Vendors: IBM.

Quick answers

Is CVE-2026-16687 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-16687 being exploited in the wild.
How severe is CVE-2026-16687?: Critical severity, with a CVSS score of 9.6, published 19 August 2026.
Which products and versions are affected?: IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2.
Is there a fix for CVE-2026-16687?: A patch was published on 2026-08-15: Patches released: FW1120.01 (Power 11), FW1060.81 (Power 10), FW950.H3 (Power 9) Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-16687 attacked?: It is attacked over the network.
Am I affected by CVE-2026-16687?: Check whether you run 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.

Technical details

A stack-based buffer overflow (CWE-121) exists in the ASMI web interface of IBM Power Systems firmware. An unauthenticated attacker with network access to the FSP (Flexible Service Processor) can send a specially crafted malformed request to trigger the overflow, enabling arbitrary code execution with the highest privileges. This allows complete compromise of the managed system with full impact to confidentiality, integrity, and availability. Patches are available: FW1120.01 or later for Power 11 systems, FW1060.81 or later for Power 10 systems, and FW950.H3 or later for Power 9 systems. As a workaround, restrict network access to the FSP interface.

Affected products

IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2

Timeline

2026-08-15: disclosed: IBM Security Bulletin initial publication
2026-08-15: patched: Patches released: FW1120.01 (Power 11), FW1060.81 (Power 10), FW950.H3 (Power 9)

References

https://www.ibm.com/support/pages/node/7283893

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