CVE-2026-16687: CWE-121 Stack-based Buffer Overflow in IBM Power Systems Firmware
A critical stack-based buffer overflow vulnerability (CWE-121) exists in IBM Power Systems Firmware affecting multiple firmware versions. The flaw resides in the ASMI web interface and allows an unauthenticated attacker with network access to send a malformed request to the Flexible Service Processor (FSP). Successful exploitation results in arbitrary code execution, granting full control over the managed system and impacting confidentiality, integrity, and availability.
AI Analysis
Technical Summary
CVE-2026-16687 is a stack-based buffer overflow vulnerability in the ASMI web interface of IBM Power Systems Firmware versions FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2. An unauthenticated attacker with network access can exploit this flaw by sending a specially crafted malformed request to the FSP, leading to arbitrary code execution. This allows the attacker to gain full control over the managed system, resulting in a complete compromise of confidentiality, integrity, and availability.
Potential Impact
Exploitation of this vulnerability allows an unauthenticated remote attacker to execute arbitrary code on the affected IBM Power Systems Firmware, leading to full system compromise. This impacts the confidentiality, integrity, and availability of the managed system, potentially allowing complete control over the device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been documented at this time.
CVE-2026-16687: CWE-121 Stack-based Buffer Overflow in IBM Power Systems Firmware
Description
A critical stack-based buffer overflow vulnerability (CWE-121) exists in IBM Power Systems Firmware affecting multiple firmware versions. The flaw resides in the ASMI web interface and allows an unauthenticated attacker with network access to send a malformed request to the Flexible Service Processor (FSP). Successful exploitation results in arbitrary code execution, granting full control over the managed system and impacting confidentiality, integrity, and availability.
CVSS v3.1
Score 9.6critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16687 is a stack-based buffer overflow vulnerability in the ASMI web interface of IBM Power Systems Firmware versions FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2. An unauthenticated attacker with network access can exploit this flaw by sending a specially crafted malformed request to the FSP, leading to arbitrary code execution. This allows the attacker to gain full control over the managed system, resulting in a complete compromise of confidentiality, integrity, and availability.
Potential Impact
Exploitation of this vulnerability allows an unauthenticated remote attacker to execute arbitrary code on the affected IBM Power Systems Firmware, leading to full system compromise. This impacts the confidentiality, integrity, and availability of the managed system, potentially allowing complete control over the device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been documented at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-23T00:09:08.103Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a85feffacd9273b497e9300
Added to database: 08/19/2026, 19:07:43 UTC
Last enriched: 08/19/2026, 19:23:00 UTC
Last updated: 08/19/2026, 22:16:00 UTC
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.