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CVE-2021-29873

25
FAUCET Score

CVE-2021-29873 describes a restricted shell escape vulnerability in IBM Flash System 900, allowing an authenticated attacker to gain sensitive information and cause a denial of service. With a CVSS score of 8.1 (HIGH), this vulnerability is easily exploitable over the network with low privileges and no user interaction, leading to high confidentiality and availability impacts. Despite its severity, there is currently no public exploit code available, no evidence of active exploitation, and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 7.8.0.0, < 8.4.0.0CPE matchmatch criteria
cpe:2.3:a:ibm:spectrum_virtualize:*:*:*:*:*:*:*:*
>= 7.8.0.0, < 8.4.0.0CPE matchmatch criteria
cpe:2.3:a:ibm:spectrum_virtualize_for_public_cloud:*:*:*:*:*:*:*:*
>= 7.8.0.0, < 8.4.0.0CPE matchmatch criteria
cpe:2.3:a:ibm:storwize_v3500_software:*:*:*:*:*:*:*:*
>= 7.8.0.0, < 8.4.0.0CPE matchmatch criteria
cpe:2.3:a:ibm:storwize_v3700_software:*:*:*:*:*:*:*:*
>= 7.8.0.0, < 8.4.0.0CPE matchmatch criteria
cpe:2.3:a:ibm:storwize_v5000_software:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
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 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0148 is in the 69th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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/206229
VDB EntryVendor Advisory
ibm.com / support/pages/node/6497111
PatchVendor Advisory
ibm.com / support/pages/node/6507091
PatchVendor Advisory