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CVE-2021-20377: IBM Security Guardium 11.3 could allow a remote attacker to obtain sensitive information when a detailed te...

IBM Security Guardium 11.3 could allow a remote attacker to obtain sensitive information when a detailed technical error message is returned in the browser. This information could be used in further attacks against the system. IBM X-Force ID: 195569.

LowCVSS 2.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

IBM Security Guardium 11.3 may expose sensitive technical details through verbose browser error messages. The disclosed impact is limited confidentiality loss, but those details could help an attacker plan later attacks. The score and source data indicate low severity, not a business-critical emergency.

Executive priority

Track as a low-priority remediation item unless Guardium 11.3 is internet-exposed or broadly accessible. Fix during normal vulnerability management cycles, with faster action for sensitive or externally reachable deployments.

Technical view

CVE-2021-20377 is an information disclosure issue in IBM Security Guardium 11.3. The CVSS 3.0 score is 2.7 with network attack vector, low complexity, high privileges required, no user interaction, and low confidentiality impact only. No CWE is listed in the supplied data.

Likely exposure

Exposure is limited to environments running IBM Security Guardium 11.3. The issue concerns detailed technical errors returned in a browser, so browser-accessible Guardium interfaces are the relevant review target.

Exploitation context

The supplied sources do not show CISA KEV listing or active exploitation. IBM describes the disclosed information as potentially useful for further attacks, but no public exploit activity is evidenced in the bundle.

Researcher notes

Focus validation on IBM Security Guardium 11.3 and information disclosure through detailed browser errors. The source bundle does not provide a CWE, specific endpoint, exploit method, or detailed patch instructions, so avoid assumptions beyond IBM advisory and X-Force data.

Mitigation direction

  • Confirm whether IBM Security Guardium 11.3 is deployed.
  • Review IBM advisory 6491125 for official remediation guidance.
  • Apply vendor-specified fixes or updates if applicable.
  • Limit browser access to Guardium interfaces to authorized administrators.
  • Reduce detailed browser error exposure where supported by IBM guidance.

Validation and detection

  • Inventory Guardium versions and confirm any 11.3 instances.
  • Review browser-facing error handling for detailed technical messages.
  • Check access controls on Guardium management interfaces.
  • Review logs for repeated error-triggering activity.
  • Verify remediation status against IBM advisory and X-Force entry.
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-2021-20377 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
Low
CVSS
2.7 (3.0)
Known Exploited
No
Published

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

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
2.7CVSS 3.0LowCVSS:3.0/AV:N/A:N/C:L/AC:L/PR:H/I:N/S:U/UI:N/RC:C/E:U/RL:O1.21.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

2.7Low
CVSS 3.0 vector shape for CVE-2021-20377Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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
IBMSecurity Guardium11.3Listed
Weakness

CWE details

No CWE listed

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