CVSS 3.1
8.2 highCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HCVE-2026-16707
High (8.2) in ibm. EPSS 0.2% chance of exploitation in the next 30 days.
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 send a specially crafted mailbox message to read or modify arbitrary regions of Hostboot memory, compromising the host firmware boot stack and the hypervisor subsequently loaded by it. Successful exploitation results in a confidentiality, integrity, and availability impact to the managed system.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-31)
- CWE
- CWE-125
- Published
- Modified
- Record from
- the NVD, synced
Affected
- ibm:power_system_e1050_\(9043-mrx\)_firmware
- ibm:power_system_e1080_\(9080-hex\)_firmware
- ibm:power_system_e1150_\(9043-mru\)_firmware
- ibm:power_system_e1180_\(9080-heu\)_firmware
- ibm:power_system_e950_\(9040-mr9\)_firmware
- ibm:power_system_e980_\(9080-m9s\)_firmware
- ibm:power_system_h922_\(9223-22s\)_firmware
- ibm:power_system_h924_\(9223-42s\)_firmware
- ibm:power_system_l1022_\(9786-22h\)_firmware
- ibm:power_system_l1024_\(9786-42h\)_firmware
- ibm:power_system_l1122_\(9856-22h\)_firmware
- ibm:power_system_l1124_\(9856-42h\)_firmware
- ibm:power_system_s1012_\(9028-21b\)_firmware
- ibm:power_system_s1014_\(9105-41b\)_firmware
- ibm:power_system_s1022_\(9105-22a\)_firmware
- ibm:power_system_s1022s_\(9105-22b\)_firmware
- ibm:power_system_s1024_\(9105-42a\)_firmware
- ibm:power_system_s1112_\(9242-21b\)_firmware
- ibm:power_system_s1112_\(9242-21t\)_firmware
- ibm:power_system_s1114_\(9824-41b\)_firmware
- ibm:power_system_s1122_\(9824-22a\)_firmware
- ibm:power_system_s1122s_\(9824-22b\)_firmware
- ibm:power_system_s1124_\(9824-42a\)_firmware
- ibm:power_system_s914_\(9009-41g\)_firmware
- ibm:power_system_s922_\(9009-22g\)_firmware
- ibm:power_system_s924_\(9009-42g\)_firmware