CVE-2021-29847

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-15 · updated 2026-06-17

Description

BMC firmware (IBM Power System S821LC Server (8001-12C) OP825.50) configuration changed to allow an authenticated user to open an insecure communication channel which could allow an attacker to obtain sensitive information using man in the middle techniques. IBM X-Force ID: 205267.

Affected products

IBM Power Hardware Management Console (7063-Cr1) Firmware: before op825.51 — fixed in op825.51
IBM Power System Cs821Lc (8005-12N) Firmware: before op825.51 — fixed in op825.51
IBM Power System Cs822Lc (8005-22N) Firmware: before op825.51 — fixed in op825.51
IBM Power System S821Lc (8001-12C) Firmware: before op825.51 — fixed in op825.51
IBM Power System S822Lc (8001-22C) Firmware: before op825.51 — fixed in op825.51

How to fix

Upgrade to a fixed version: IBM Power Hardware Management Console (7063-Cr1) Firmware op825.51; IBM Power System Cs821Lc (8005-12N) Firmware op825.51; IBM Power System Cs822Lc (8005-22N) Firmware op825.51; IBM Power System S821Lc (8001-12C) Firmware op825.51; IBM Power System S822Lc (8001-22C) Firmware op825.51. Check the vendor advisory for mitigations.

References

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