CVE-2026-16933: CWE-190 Integer Overflow or Wraparound in IBM Power Systems Firmware
CVE-2026-16933 is an integer overflow or wraparound vulnerability in IBM Power Systems Firmware affecting multiple firmware versions. It exists in the interface between the BMC/FSP and the host system. An attacker with service or root access to the BMC/FSP can exploit this flaw to read and write arbitrary host system memory, gaining full control over the host and all hosted partitions. This results in a critical impact on confidentiality, integrity, and availability.
AI Analysis
Technical Summary
IBM Power Systems Firmware versions FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 through OP940.81 (Power HMC) contain an integer overflow or wraparound vulnerability (CWE-190) in the interface between the BMC/FSP and the host system. An attacker with service or root privileges on the BMC/FSP can exploit this vulnerability to read and write arbitrary regions of host system memory, resulting in full control over the host system and all hosted partitions. The CVSS 3.1 base score is 8.2, reflecting high severity with impacts on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows an attacker with high privileges on the BMC/FSP to gain full control over the host system and all hosted partitions by reading and writing arbitrary host memory. This compromises confidentiality, integrity, and availability of the affected systems.
Mitigation Recommendations
No patch or remediation information is provided in the available data. Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until a fix is available, restrict access to the BMC/FSP interfaces to trusted administrators only to reduce risk.
CVE-2026-16933: CWE-190 Integer Overflow or Wraparound in IBM Power Systems Firmware
Description
CVE-2026-16933 is an integer overflow or wraparound vulnerability in IBM Power Systems Firmware affecting multiple firmware versions. It exists in the interface between the BMC/FSP and the host system. An attacker with service or root access to the BMC/FSP can exploit this flaw to read and write arbitrary host system memory, gaining full control over the host and all hosted partitions. This results in a critical impact on confidentiality, integrity, and availability.
CVSS v3.1
Score 8.2high
Affected software
IBM
Power Systems Firmware
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
IBM Power Systems Firmware versions FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 through OP940.81 (Power HMC) contain an integer overflow or wraparound vulnerability (CWE-190) in the interface between the BMC/FSP and the host system. An attacker with service or root privileges on the BMC/FSP can exploit this vulnerability to read and write arbitrary regions of host system memory, resulting in full control over the host system and all hosted partitions. The CVSS 3.1 base score is 8.2, reflecting high severity with impacts on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows an attacker with high privileges on the BMC/FSP to gain full control over the host system and all hosted partitions by reading and writing arbitrary host memory. This compromises confidentiality, integrity, and availability of the affected systems.
Mitigation Recommendations
No patch or remediation information is provided in the available data. Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until a fix is available, restrict access to the BMC/FSP interfaces to trusted administrators only to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T07:31:49.353Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a860281acd9273b4982c684
Added to database: 08/19/2026, 19:22:41 UTC
Last enriched: 09/11/2026, 06:47:07 UTC
Last updated: 10/02/2026, 14:46:05 UTC
Views: 69
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.