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CVE Record

CVE-2021-29747: IBM InfoSphere Information Server 11.7 could allow a remote attacker to obtain highly sensitive information...

IBM InfoSphere Information Server 11.7 could allow a remote attacker to obtain highly sensitive information due to a vulnerability in the authentication mechanism. IBM X-Force ID: 201775.

MediumCVSS 5.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-29747 is an IBM InfoSphere Information Server 11.7 authentication-mechanism issue that could let a remote attacker obtain highly sensitive information. The listed CVSS score is medium, but the confidentiality impact is high, so exposed installations deserve prompt review.

Executive priority

Prioritize this for any InfoSphere 11.7 system storing sensitive business or regulated data, especially if reachable beyond trusted networks. It is not KEV-confirmed, but confidentiality exposure is the business concern.

Technical view

The CVE affects IBM InfoSphere Information Server 11.7. The vector is network-accessible with no privileges or user interaction, high attack complexity, unchanged scope, high confidentiality impact, and no integrity or availability impact. IBM X-Force tracks it as ID 201775.

Likely exposure

Exposure is limited to environments running IBM InfoSphere Information Server 11.7. Risk increases where relevant services are reachable by untrusted networks or where the platform handles regulated, credential, customer, or operational data.

Exploitation context

The provided bundle does not show CISA KEV listing or cited active exploitation. The CVSS exploit maturity is listed as unproven, and attack complexity is high, so treat exploitation evidence as incomplete rather than confirmed.

Researcher notes

Evidence is concise: affected product and version are clear, but CWE details and concrete exploit conditions are not provided in the bundle. Avoid assuming other IBM products, versions, proof-of-concept availability, or specific fixes beyond vendor guidance.

Mitigation direction

  • Inventory IBM InfoSphere Information Server 11.7 deployments.
  • Review IBM support advisory 6453437 and X-Force 201775 for vendor remediation.
  • Apply only IBM-supported fixes or workarounds applicable to the deployment.
  • Limit untrusted network reachability to affected InfoSphere services until remediated.
  • Increase monitoring for unusual authentication and sensitive-data access activity.

Validation and detection

  • Confirm whether IBM InfoSphere Information Server 11.7 is installed.
  • Map all reachable InfoSphere endpoints and management interfaces.
  • Check IBM advisory applicability against installed build and maintenance level.
  • Verify remediation through vendor-supported version, fix, or workaround records.
  • Review authentication and access logs for suspicious sensitive-data access.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-29747 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.9 (3.0)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.9CVSS 3.0MediumCVSS:3.0/AV:N/UI:N/S:U/AC:H/PR:N/I:N/C:H/A:N/RL:O/E:U/RC:C2.23.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.9Medium
CVSS 3.0 vector shape for CVE-2021-29747Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
IBMInfoSphere Information Server11.7Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.