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01 Record

CVE-2021-20505

The PowerVM Logical Partition Mobility(LPM) (PowerVM Hypervisor FW920, FW930, FW940, and FW950) encryption key exchange protocol can be compromised. If an attacker has the ability to capture encrypted

MediumPUBLISHEDCNA: ibm
CNA base score4.4 CVSS v3.xCVSS:3.0/UI:N/S:U/I:N/C:H/AC:H/PR:H/AV:N/A:N/RC:C/RL:O/E:U
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02 Description

The PowerVM Logical Partition Mobility(LPM) (PowerVM Hypervisor FW920, FW930, FW940, and FW950) encryption key exchange protocol can be compromised. If an attacker has the ability to capture encrypted

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.54% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 45.4% of scored records. A rank, not a probability.
NVD base score
4.4 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-07-29 12:00Z5 YR AGO
Last updated
2024-09-16 17:49Z2 YR AGO
Reserved
2020-12-17
Assigning CNA
ibm
Record state
PUBLISHED
Severity
Medium (CVSS 4.4)
CNA CVSS vector
CVSS:3.0/UI:N/S:U/I:N/C:H/AC:H/PR:H/AV:N/A:N/RC:C/RL:O/E:U
Weaknesses
No CWE assigned
Data version
5.1
Document digest
cf3c9f5b594e04f29a98706bb5a6dbfebc475c48e17588b767177800fb3f6d82

05 Affected products

VendorProductVersionsPlatforms
IBMPowerVM HypervisorFW920, FW930, FW940, FW950—

06 References