8.2
HIGH
CVSS 3.1
CVE-2026-16933
Power System Integer Overflow
Overview
Description
IBM Power Systems Firmware 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) is affected by a vulnerability in the interface between the BMC/FSP and the host system. An attacker with service account or root access to the BMC/FSP can read and write arbitrary regions of host system memory, giving full control over the host system and all hosted partitions, resulting in a confidentiality, integrity, and availability impact.
Details
INFO
Published Date :
Aug. 19, 2026, 8:17 p.m.
Last Modified :
Aug. 25, 2026, 2:05 p.m.
Remotely Exploit :
No
Source :
[email protected]
Impact
Affected Products
The following products are affected by CVE-2026-16933
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 9a959283-ebb5-44b6-b705-dcc2bbced522 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
Apply firmware updates to IBM Power Systems to address arbitrary memory access.
- Update IBM Power Systems firmware to the latest version.
- Apply patches provided by IBM for affected firmware.
- Restrict access to BMC/FSP service accounts.
- Monitor host system memory for unauthorized access.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-16933.
| URL | Resource |
|---|---|
| https://www.ibm.com/support/pages/node/7283216 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-16933 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-16933
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-16933 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-16933 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 25, 2026
Action Type Old Value New Value Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s1122_(9824-22a)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1110.00 up to (excluding) fw1110.31 *cpe:2.3:o:ibm:power_system_s1122_(9824-22a)_firmware:fw1120.00:*:*:*:*:*:*:* OR cpe:2.3:h:ibm:power_system_s1122_(9824-22a):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s1124_(9824-42a)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1110.00 up to (excluding) fw1110.31 *cpe:2.3:o:ibm:power_system_s1124_(9824-42a)_firmware:fw1120.00:*:*:*:*:*:*:* OR cpe:2.3:h:ibm:power_system_s1124_(9824-42a):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s1122s_(9824-22b)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1110.00 up to (excluding) fw1110.31 *cpe:2.3:o:ibm:power_system_s1122s_(9824-22b)_firmware:fw1120.00:*:*:*:*:*:*:* OR cpe:2.3:h:ibm:power_system_s1122s_(9824-22b):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s1114_(9824-41b)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1110.00 up to (excluding) fw1110.31 *cpe:2.3:o:ibm:power_system_s1114_(9824-41b)_firmware:fw1120.00:*:*:*:*:*:*:* OR cpe:2.3:h:ibm:power_system_s1114_(9824-41b):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_l1122_(9856-22h)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1110.00 up to (excluding) fw1110.31 *cpe:2.3:o:ibm:power_system_l1122_(9856-22h)_firmware:fw1120.00:*:*:*:*:*:*:* OR cpe:2.3:h:ibm:power_system_l1122_(9856-22h):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_l1124_(9856-42h)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1110.00 up to (excluding) fw1110.31 *cpe:2.3:o:ibm:power_system_l1124_(9856-42h)_firmware:fw1120.00:*:*:*:*:*:*:* OR cpe:2.3:h:ibm:power_system_l1124_(9856-42h):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_e1150_(9043-mru)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1110.00 up to (excluding) fw1110.31 *cpe:2.3:o:ibm:power_system_e1150_(9043-mru)_firmware:fw1120.00:*:*:*:*:*:*:* OR cpe:2.3:h:ibm:power_system_e1150_(9043-mru):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s1112_(9242-21b)_firmware:fw1120.00:*:*:*:*:*:*:* OR cpe:2.3:h:ibm:power_system_s1112_(9242-21b):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s1112_(9242-21t)_firmware:fw1120.00:*:*:*:*:*:*:* OR cpe:2.3:h:ibm:power_system_s1112_(9242-21t):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_e1080_(9080-hex)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1060.00 up to (excluding) fw1060.81 OR cpe:2.3:h:ibm:power_system_e1080_(9080-hex):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s1022_(9105-22a)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1060.00 up to (excluding) fw1060.81 OR cpe:2.3:h:ibm:power_system_s1022_(9105-22a):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s1024_(9105-42a)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1060.00 up to (excluding) fw1060.81 OR cpe:2.3:h:ibm:power_system_s1024_(9105-42a):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s1022s_(9105-22b)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1060.00 up to (excluding) fw1060.81 OR cpe:2.3:h:ibm:power_system_s1022s_(9105-22b):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s1014_(9105-41b)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1060.00 up to (excluding) fw1060.81 OR cpe:2.3:h:ibm:power_system_s1014_(9105-41b):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_l1022_(9786-22h)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1060.00 up to (excluding) fw1060.81 OR cpe:2.3:h:ibm:power_system_l1022_(9786-22h):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_l1024_(9786-42h)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1060.00 up to (excluding) fw1060.81 OR cpe:2.3:h:ibm:power_system_l1024_(9786-42h):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_e1050_(9043-mrx)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1060.00 up to (excluding) fw1060.81 OR cpe:2.3:h:ibm:power_system_e1050_(9043-mrx):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s1012_(9028-21b)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1060.00 up to (excluding) fw1060.81 OR cpe:2.3:h:ibm:power_system_s1012_(9028-21b):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_e1180_(9080-heu)_firmware:*:*:*:*:*:*:*:* versions from (including) fw1110.00 up to (excluding) fw1110.31 *cpe:2.3:o:ibm:power_system_e1180_(9080-heu)_firmware:fw1120.00:*:*:*:*:*:*:* OR cpe:2.3:h:ibm:power_system_e1180_(9080-heu):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s922_(9009-22g)_firmware:*:*:*:*:*:*:*:* versions from (including) fw950.00 up to (excluding) fw950.h3 OR cpe:2.3:h:ibm:power_system_s922_(9009-22g):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_h922_(9223-22s)_firmware:*:*:*:*:*:*:*:* versions from (including) fw950.00 up to (excluding) fw950.h3 OR cpe:2.3:h:ibm:power_system_h922_(9223-22s):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s914_(9009-41g)_firmware:*:*:*:*:*:*:*:* versions from (including) fw950.00 up to (excluding) fw950.h3 OR cpe:2.3:h:ibm:power_system_s914_(9009-41g):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_s924_(9009-42g)_firmware:*:*:*:*:*:*:*:* versions from (including) fw950.00 up to (excluding) fw950.h3 OR cpe:2.3:h:ibm:power_system_s924_(9009-42g):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_h924_(9223-42s)_firmware:*:*:*:*:*:*:*:* versions from (including) fw950.00 up to (excluding) fw950.h3 OR cpe:2.3:h:ibm:power_system_h924_(9223-42s):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_e950_(9040-mr9)_firmware:*:*:*:*:*:*:*:* versions from (including) fw950.00 up to (excluding) fw950.h3 OR cpe:2.3:h:ibm:power_system_e950_(9040-mr9):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_e980_(9080-m9s)_firmware:*:*:*:*:*:*:*:* versions from (including) fw950.00 up to (excluding) fw950.h3 OR cpe:2.3:h:ibm:power_system_e980_(9080-m9s):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_ac922_(8335-gth)_firmware:*:*:*:*:*:*:*:* versions from (including) op940 up to (excluding) op940.a2 OR cpe:2.3:h:ibm:power_system_ac922_(8335-gth):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_system_ac922_(8335-gtx)_firmware:*:*:*:*:*:*:*:* versions from (including) op940 up to (excluding) op940.a2 OR cpe:2.3:h:ibm:power_system_ac922_(8335-gtx):-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ibm:power_hardware_management_console_(7063-cr2)_firmware:*:*:*:*:*:*:*:* versions from (including) op940 up to (excluding) op940.82 OR cpe:2.3:h:ibm:power_hardware_management_console_(7063-cr2):-:*:*:*:*:*:*:* Added Reference Type IBM Corporation: https://www.ibm.com/support/pages/node/7283216 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 22, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-16933', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-21T16:08:13.067622Z'} {'id': 'CVE-2026-16933', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-21T00:00:00+00:00'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 21, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-16933', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-21T16:08:13.067622Z'} -
New CVE Received by [email protected]
Aug. 19, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:o:ibm:power_systems_firmware:fw1120.00:*:*:*:*:*:*:*', 'cpe:2.3:o:ibm:power_systems_firmware:fw1110.00:*:*:*:*:*:*:*', 'cpe:2.3:o:ibm:power_systems_firmware:fw1110.30:*:*:*:*:*:*:*', 'cpe:2.3:o:ibm:power_systems_firmware:fw1060.00:*:*:*:*:*:*:*', 'cpe:2.3:o:ibm:power_systems_firmware:fw1060.80:*:*:*:*:*:*:*', 'cpe:2.3:o:ibm:power_systems_firmware:fw950.00:*:*:*:*:*:*:*', 'cpe:2.3:o:ibm:power_systems_firmware:fw950.h2:*:*:*:*:*:*:*', 'cpe:2.3:o:ibm:power_systems_firmware:op940.00:*:*:*:*:*:*:*', 'cpe:2.3:o:ibm:power_systems_firmware:op940.a1:*:*:*:*:*:*:*'], 'vendor': 'IBM', 'product': 'Power Systems Firmware', 'versions': [{'status': 'affected', 'version': 'FW1120.00'}, {'status': 'affected', 'version': 'FW1110.00', 'versionType': 'semver', 'lessThanOrEqual': 'FW1110.30'}, {'status': 'affected', 'version': 'FW1060.00', 'versionType': 'semver', 'lessThanOrEqual': 'FW1060.80'}, {'status': 'affected', 'version': 'FW950.00', 'versionType': 'semver', 'lessThanOrEqual': 'FW950.H2'}, {'status': 'affected', 'version': 'OP940.00', 'versionType': 'semver', 'lessThanOrEqual': 'OP940.a1'}, {'status': 'affected', 'version': 'OP940.00', 'versionType': 'semver', 'lessThanOrEqual': 'OP940.81'}]}] Added Description IBM Power Systems Firmware 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) is affected by a vulnerability in the interface between the BMC/FSP and the host system. An attacker with service account or root access to the BMC/FSP can read and write arbitrary regions of host system memory, giving full control over the host system and all hosted partitions, resulting in a confidentiality, integrity, and availability impact. Added CVSS V3.1 AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-190 Added Reference https://www.ibm.com/support/pages/node/7283216
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.