Details of VAR-202608-7280

ID

VAR-202608-7280

CVE

CVE-2026-16661

TITLE

IBM of Power System E1050 (9043-MRX) Firmware Integer overflow vulnerability in multiple products, including

Trust: 0.8

sources: JVNDB: JVNDB-2026-030143

DESCRIPTION

IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can exploit this vulnerability, allowing arbitrary code to be executed in the host firmware runtime, giving full control over the managed system, resulting in a confidentiality, integrity, and availability impact to the managed system. An attacker with authenticated service level access rights can... - All information handled by the software may be overwritten. - The software may completely shut down

Trust: 1.62

sources: NVD: CVE-2026-16661 // JVNDB: JVNDB-2026-030143

AFFECTED PRODUCTS

vendor:	ibm	model:	power system s1112 \	scope:	eq	version:	fw1120.00	Trust: 2.0
vendor:	ibm	model:	power system s1112	scope:	-	version:	-	Trust: 1.6
vendor:	ibm	model:	power system l1022 \	scope:	lt	version:	fw1060.81	Trust: 1.0
vendor:	ibm	model:	power system s1022 \	scope:	gte	version:	fw1060.00	Trust: 1.0
vendor:	ibm	model:	power system e1150 \	scope:	lt	version:	fw1110.31	Trust: 1.0
vendor:	ibm	model:	power system e1080 \	scope:	lt	version:	fw1060.81	Trust: 1.0
vendor:	ibm	model:	power system s1124 \	scope:	gte	version:	fw1110.00	Trust: 1.0
vendor:	ibm	model:	power system l1024 \	scope:	gte	version:	fw1060.00	Trust: 1.0
vendor:	ibm	model:	power system s924 \	scope:	gte	version:	fw950.00	Trust: 1.0
vendor:	ibm	model:	power system s1122s \	scope:	lt	version:	fw1110.31	Trust: 1.0
vendor:	ibm	model:	power system s1122 \	scope:	eq	version:	fw1120.00	Trust: 1.0
vendor:	ibm	model:	power system s1114 \	scope:	eq	version:	fw1120.00	Trust: 1.0
vendor:	ibm	model:	power system l1122 \	scope:	lt	version:	fw1110.31	Trust: 1.0
vendor:	ibm	model:	power system s1124 \	scope:	lt	version:	fw1110.31	Trust: 1.0
vendor:	ibm	model:	power system s1122s \	scope:	gte	version:	fw1110.00	Trust: 1.0
vendor:	ibm	model:	power system e1150 \	scope:	gte	version:	fw1110.00	Trust: 1.0
vendor:	ibm	model:	power system l1022 \	scope:	gte	version:	fw1060.00	Trust: 1.0
vendor:	ibm	model:	power system h924 \	scope:	gte	version:	fw950.00	Trust: 1.0
vendor:	ibm	model:	power system e950 \	scope:	lt	version:	fw950.h3	Trust: 1.0
vendor:	ibm	model:	power system h922 \	scope:	gte	version:	fw950.00	Trust: 1.0
vendor:	ibm	model:	power system s1012 \	scope:	lt	version:	fw1060.81	Trust: 1.0
vendor:	ibm	model:	power system l1122 \	scope:	gte	version:	fw1110.00	Trust: 1.0
vendor:	ibm	model:	power system e1080 \	scope:	gte	version:	fw1060.00	Trust: 1.0
vendor:	ibm	model:	power system e1180 \	scope:	eq	version:	fw1120.00	Trust: 1.0
vendor:	ibm	model:	power system s922 \	scope:	lt	version:	fw950.h3	Trust: 1.0
vendor:	ibm	model:	power system s1014 \	scope:	lt	version:	fw1060.81	Trust: 1.0
vendor:	ibm	model:	power system s1012 \	scope:	gte	version:	fw1060.00	Trust: 1.0
vendor:	ibm	model:	power system s1122 \	scope:	lt	version:	fw1110.31	Trust: 1.0
vendor:	ibm	model:	power system s1122 \	scope:	gte	version:	fw1110.00	Trust: 1.0
vendor:	ibm	model:	power system s914 \	scope:	gte	version:	fw950.00	Trust: 1.0
vendor:	ibm	model:	power system s1014 \	scope:	gte	version:	fw1060.00	Trust: 1.0
vendor:	ibm	model:	power system s924 \	scope:	lt	version:	fw950.h3	Trust: 1.0
vendor:	ibm	model:	power system s1114 \	scope:	gte	version:	fw1110.00	Trust: 1.0
vendor:	ibm	model:	power system e980 \	scope:	gte	version:	fw950.00	Trust: 1.0
vendor:	ibm	model:	power system e1050 \	scope:	lt	version:	fw1060.81	Trust: 1.0
vendor:	ibm	model:	power system h922 \	scope:	lt	version:	fw950.h3	Trust: 1.0
vendor:	ibm	model:	power system l1124 \	scope:	eq	version:	fw1120.00	Trust: 1.0
vendor:	ibm	model:	power system s1114 \	scope:	lt	version:	fw1110.31	Trust: 1.0
vendor:	ibm	model:	power system s1022s \	scope:	gte	version:	fw1060.00	Trust: 1.0
vendor:	ibm	model:	power system e1180 \	scope:	lt	version:	fw1110.31	Trust: 1.0
vendor:	ibm	model:	power system h924 \	scope:	lt	version:	fw950.h3	Trust: 1.0
vendor:	ibm	model:	power system e950 \	scope:	gte	version:	fw950.00	Trust: 1.0
vendor:	ibm	model:	power system s1022s \	scope:	lt	version:	fw1060.81	Trust: 1.0
vendor:	ibm	model:	power system e1050 \	scope:	gte	version:	fw1060.00	Trust: 1.0
vendor:	ibm	model:	power system s1122s \	scope:	eq	version:	fw1120.00	Trust: 1.0
vendor:	ibm	model:	power system e1150 \	scope:	eq	version:	fw1120.00	Trust: 1.0
vendor:	ibm	model:	power system e1180 \	scope:	gte	version:	fw1110.00	Trust: 1.0
vendor:	ibm	model:	power system l1122 \	scope:	eq	version:	fw1120.00	Trust: 1.0
vendor:	ibm	model:	power system s1124 \	scope:	eq	version:	fw1120.00	Trust: 1.0
vendor:	ibm	model:	power system s914 \	scope:	lt	version:	fw950.h3	Trust: 1.0
vendor:	ibm	model:	power system l1124 \	scope:	lt	version:	fw1110.31	Trust: 1.0
vendor:	ibm	model:	power system s1024 \	scope:	lt	version:	fw1060.81	Trust: 1.0
vendor:	ibm	model:	power system e980 \	scope:	lt	version:	fw950.h3	Trust: 1.0
vendor:	ibm	model:	power system l1124 \	scope:	gte	version:	fw1110.00	Trust: 1.0
vendor:	ibm	model:	power system s1022 \	scope:	lt	version:	fw1060.81	Trust: 1.0
vendor:	ibm	model:	power system s1024 \	scope:	gte	version:	fw1060.00	Trust: 1.0
vendor:	ibm	model:	power system l1024 \	scope:	lt	version:	fw1060.81	Trust: 1.0
vendor:	ibm	model:	power system s922 \	scope:	gte	version:	fw950.00	Trust: 1.0
vendor:	ibm	model:	power system l1024	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system s1022s	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system s1122s	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system s924	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system s1024	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system l1124	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system e980	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system s1124	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system e1050	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system e1080	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system s1122	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system l1022	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system s1114	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system e1180	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system s1012	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system l1122	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system h924	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system e1150	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system s1014	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system h922	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system s1022	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system s922	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system s914	scope:	-	version:	-	Trust: 0.8
vendor:	ibm	model:	power system e950	scope:	-	version:	-	Trust: 0.8

sources: JVNDB: JVNDB-2026-030143 // NVD: CVE-2026-16661

CVSS

SEVERITY

CVSSV2

CVSSV3

psirt@us.ibm.com:	CVE-2026-16661
value:	HIGH
Trust: 1.0
OTHER:	JVNDB-2026-030143
value:	HIGH
Trust: 0.8

psirt@us.ibm.com:	CVE-2026-16661
baseSeverity:	HIGH
baseScore:	8.2
vectorString:	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
attackVector:	LOCAL
attackComplexity:	LOW
privilegesRequired:	HIGH
userInteraction:	NONE
scope:	CHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	1.5
impactScore:	6.0
version:	3.1
Trust: 1.0
OTHER:	JVNDB-2026-030143
baseSeverity:	HIGH
baseScore:	8.2
vectorString:	CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
attackVector:	LOCAL
attackComplexity:	LOW
privilegesRequired:	HIGH
userInteraction:	NONE
scope:	CHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: JVNDB: JVNDB-2026-030143 // NVD: CVE-2026-16661

PROBLEMTYPE DATA

problemtype:	CWE-190	Trust: 1.0
problemtype:	Integer overflow or wraparound (CWE-190) [ others ]	Trust: 0.8

sources: JVNDB: JVNDB-2026-030143 // NVD: CVE-2026-16661

PATCH

title:

Security Bulletin

url:

https://www.ibm.com/support/pages/node/7283237

Trust: 0.8

sources: JVNDB: JVNDB-2026-030143

EXTERNAL IDS

db:	NVD	id:	CVE-2026-16661	Trust: 2.6
db:	JVNDB	id:	JVNDB-2026-030143	Trust: 0.8

sources: JVNDB: JVNDB-2026-030143 // NVD: CVE-2026-16661

REFERENCES

url:	https://www.ibm.com/support/pages/node/7283237	Trust: 1.0
url:	https://nvd.nist.gov/vuln/detail/cve-2026-16661	Trust: 0.8

sources: JVNDB: JVNDB-2026-030143 // NVD: CVE-2026-16661

SOURCES

db:	JVNDB	id:	JVNDB-2026-030143
db:	NVD	id:	CVE-2026-16661

LAST UPDATE DATE

2026-08-27T23:37:26.325000+00:00

SOURCES UPDATE DATE

db:	JVNDB	id:	JVNDB-2026-030143	date:	2026-08-26T07:14:00
db:	NVD	id:	CVE-2026-16661	date:	2026-08-25T19:35:41.713

SOURCES RELEASE DATE

db:	JVNDB	id:	JVNDB-2026-030143	date:	2026-08-26T00:00:00
db:	NVD	id:	CVE-2026-16661	date:	2026-08-19T20:17:01.937