CVE-2026-18871

IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, and FW1060.00 through FW1060.80 is affected by a vulnerability in host firmware configuration parsing. An attacker with authenticated service-level access to the service processor can write specially crafted configuration data, causing the host firmware boot stack to crash with possible memory corruption during system initialisation, resulting in an integrity and availability impact to the managed system. It has a CVSS v3.1 base score of 7.3 (HIGH).

CVE-2026-18871 has a CVSS v3.1 score of 7.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0011, placing it in the 0th percentile for exploitation probability.

CVE-2026-18871 affects products from ibm, specifically: power_system_e1050_\(9043-mrx\), power_system_e1050_\(9043-mrx\)_firmware, power_system_e1080_\(9080-hex\), power_system_e1080_\(9080-hex\)_firmware, power_system_e1150_\(9043-mru\), power_system_e1150_\(9043-mru\)_firmware, power_system_e1180_\(9080-heu\), power_system_e1180_\(9080-heu\)_firmware, power_system_l1022_\(9786-22h\), power_system_l1022_\(9786-22h\)_firmware, power_system_l1024_\(9786-42h\), power_system_l1024_\(9786-42h\)_firmware, power_system_l1122_\(9856-22h\), power_system_l1122_\(9856-22h\)_firmware, power_system_l1124_\(9856-42h\), power_system_l1124_\(9856-42h\)_firmware, power_system_s1012_\(9028-21b\), power_system_s1012_\(9028-21b\)_firmware, power_system_s1014_\(9105-41b\), power_system_s1014_\(9105-41b\)_firmware, power_system_s1022_\(9105-22a\), power_system_s1022_\(9105-22a\)_firmware, power_system_s1022s_\(9105-22b\), power_system_s1022s_\(9105-22b\)_firmware, power_system_s1024_\(9105-42a\), power_system_s1024_\(9105-42a\)_firmware, power_system_s1112_\(9242-21b\), power_system_s1112_\(9242-21b\)_firmware, power_system_s1112_\(9242-21t\), power_system_s1112_\(9242-21t\)_firmware, power_system_s1114_\(9824-41b\), power_system_s1114_\(9824-41b\)_firmware, power_system_s1122_\(9824-22a\), power_system_s1122_\(9824-22a\)_firmware, power_system_s1122s_\(9824-22b\), power_system_s1122s_\(9824-22b\)_firmware, power_system_s1124_\(9824-42a\), power_system_s1124_\(9824-42a\)_firmware. Check the affected products table above for specific version ranges.

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.