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CVE-2021-38917

29
FAUCET Score

CVE-2021-38917 is a critical vulnerability affecting IBM PowerVM Hypervisor FW860, FW940, and FW950. An attacker with service access to the FSP can exploit this flaw to read and write arbitrary host system memory through crafted service procedures. With a CVSS score of 9.1, this vulnerability poses a significant risk due to its network attack vector, low attack complexity, and high impact on confidentiality and integrity. There is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
fw860CPE matchmatch criteria
cpe:2.3:o:ibm:powervm_hypervisor:fw860:*:*:*:*:*:*:*
fw940CPE matchmatch criteria
cpe:2.3:o:ibm:powervm_hypervisor:fw940:*:*:*:*:*:*:*
fw950CPE matchmatch criteria
cpe:2.3:o:ibm:powervm_hypervisor:fw950:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.4HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.48%
Probability of exploitation in next 30 days
EPSS Percentile
71.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0148 is in the 58th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/210018
VDB EntryVendor Advisory
ibm.com / support/pages/node/6525010
Vendor Advisory