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NVD / CVE Program· CNA ibm

CVE-2021-29873: IBM Flash System 900 could allow an authenticated attacker to obtain sensitive information and cause a denial of service due to a restricted…

HighCVSS 8.1 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 32/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.5% (FIRST EPSS); higher than 75% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

IBM Flash System 900 could allow an authenticated attacker to obtain sensitive information and cause a denial of service due to a restricted shell escape vulnerability. IBM X-Force ID: 206229.

Published
Oct 21, 2021
Updated
Jun 16, 2026
EPSS
1.5% · 75th percentile
CWE
—

Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
32 / 40 · 8.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.5%

CNA vs NVD score

NVD
8.1
CNA · ibm
8.8
0.7 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-29873

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
ibmspectrum virtualize
ibmspectrum virtualize for public cloud
ibmstorwize v3500 software
ibmstorwize v3700 software
ibmstorwize v5000 software
ibmstorwize v5100 software
ibmstorwize v7000 software
ibmsan volume controller firmware
ibmflashsystem 9100 firmware
ibmflashsystem 9100
ibmflashsystem 9000 firmware
ibmflashsystem 9000

Versions reported by the vendor

Affected version ranges reported by the assigning authority (ibm). Independent of NVD's CPE analysis and usually ahead of it.

  • IBM FlashSystem 900

    • 1.6.1.4, 1.5.2.10affected

  • IBM FlashSystem 9100 Family

    • 8.4, 7.8affected

  • IBM FlashSystem V9000

    • 7.8, 8.4affected

  • IBM SAN Volume Controller

    • 7.8, 8.4affected

  • IBM Spectrum Virtualize for Public Cloud

    • 7.8, 8.4affected

  • IBM Spectrum Virtualize Software

    • 7.8, 8.4affected

  • IBM Storwize V3500

    • 7.8, 8.4affected

  • IBM Storwize V3700

    • 7.8, 8.4affected

  • IBM Storwize V5000

    • 7.8, 8.4affected

  • IBM Storwize V5100

    • 8.4, 7.8affected

  • IBM Storwize V7000

    • 8.4, 7.8affected
Affected versions · NVD (10)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • ibm flashsystem 9000 firmware7.8.0.0 and later · before 8.4.0.0
  • ibm flashsystem 9100 firmware7.8.0.0 and later · before 8.4.0.0
  • ibm san volume controller firmware7.8.0.0 and later · before 8.4.0.0
  • ibm spectrum virtualize7.8.0.0 and later · before 8.4.0.0
  • ibm spectrum virtualize for public cloud7.8.0.0 and later · before 8.4.0.0
  • ibm storwize v3500 software7.8.0.0 and later · before 8.4.0.0
  • ibm storwize v3700 software7.8.0.0 and later · before 8.4.0.0
  • ibm storwize v5000 software7.8.0.0 and later · before 8.4.0.0
  • ibm storwize v5100 software7.8.0.0 and later · before 8.4.0.0
  • ibm storwize v7000 software7.8.0.0 and later · before 8.4.0.0

Same product

ibm: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-38969IBM Spectrum Virtualize 8.2, 8.3, and 8.4 could allow an attacker to allow unauthorized access due to the reuse of support generated…
    39Monitor
  • CVE-2022-43873IBM Spectrum Virtualize privilege escalation
    35Monitor
  • CVE-2020-4686IBM Spectrum Virtualize 8.3.1 could allow a remote user authenticated via LDAP to escalate their privileges and perform actions they should…
    32Monitor

Published before and after this one in the same product

  • Later →CVE-2022-39167Jan 19, 2023 · IBM Spectrum Virtualize information disclosure
    23Monitor
  • Later →CVE-2022-43870Feb 22, 2023 · IBM Spectrum Virtualize information disclosure
    26Monitor
  • Later →CVE-2023-27870May 11, 2023 · IBM Spectrum Virtualize information disclosure
    23Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records