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CVE Record

CVE-2020-4476: IBM Sterling File Gateway 2.2.0.0 through 2.2.6.5 and 6.0.0.0 through 6.0.3.2 could allow a remote attacker...

IBM Sterling File Gateway 2.2.0.0 through 2.2.6.5 and 6.0.0.0 through 6.0.3.2 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: 181778.

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2020-4476 is an information disclosure issue in IBM Sterling File Gateway. A remote attacker could receive detailed technical error messages in the browser and use that information to support later attacks. The direct impact is limited confidentiality exposure, but the product often handles sensitive file-transfer workflows.

Executive priority

Treat as a moderate-priority remediation item. It is not described as actively exploited, but exposed file-transfer systems can support sensitive business workflows, and technical leakage can help attackers prepare follow-on attacks.

Technical view

Affected IBM Sterling File Gateway versions are 2.2.0.0 through 2.2.6.5 and 6.0.0.0 through 6.0.3.2. The CVSS 3.0 score is 5.3 with network access, low complexity, no privileges, no user interaction, and low confidentiality impact. Sources do not provide exploit mechanics.

Likely exposure

Exposure is most relevant where IBM Sterling File Gateway web interfaces are reachable by untrusted networks and run an affected version. Public internet exposure would increase business urgency.

Exploitation context

The source bundle does not indicate active exploitation, and the CVE is not listed as KEV. IBM X-Force identifies the issue as information disclosure that could assist further attacks.

Researcher notes

The public bundle lacks CWE mapping, exploit details, and explicit remediation text. Analysis should stay focused on version exposure, browser-displayed technical errors, and IBM’s advisory. Do not infer affected IBM products beyond Sterling File Gateway.

Mitigation direction

  • Confirm affected IBM Sterling File Gateway versions in production and non-production environments.
  • Review IBM’s advisory for official remediation and supported upgrade guidance.
  • Limit untrusted network access to Sterling File Gateway web interfaces.
  • Ensure browser-facing errors expose generic messages, not technical details.
  • Monitor for unusual error activity against exposed web interfaces.

Validation and detection

  • Inventory Sterling File Gateway versions against the affected ranges.
  • Confirm whether any affected web interface is internet-accessible.
  • Review logs for repeated requests producing detailed technical errors.
  • Validate error pages shown to users do not reveal technical internals.
  • Track remediation against IBM advisory guidance.
Prepared
Confidence
medium
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-2020-4476 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/S:U/AC:L/UI:N/AV:N/C:L/A:N/PR:N/I:N/E:U/RL:O/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
5.3CVSS 3.0MediumCVSS:3.0/S:U/AC:L/UI:N/AV:N/C:L/A:N/PR:N/I:N/E:U/RL:O/RC:C3.91.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.3Medium
CVSS 3.0 vector shape for CVE-2020-4476Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/S:U/AC:L/UI:N/AV:N/C:L/A:N/PR:N/I:N/E:U/RL:O/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
IBMSterling File Gateway2.2.0.0, 6.0.3.2, 2.2.6.5, 6.0.0.0Listed
Weakness

CWE details

No CWE listed

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