CVE-2020-4791

Sensitive information disclosure via improper certificate validation

Published Feb 9, 2021 · Updated Sep 16, 2024

Improper certificate validation in IBM Security Identity Governance and Intelligence 5.2.6 allows attackers to read sensitive data via MITM. The signup path in IBM Security Access Request apps validates a peer certificate incorrectly, but IBM has not disclosed the failed trust or hostname check. Exploitation requires unauthenticated attackers in an adjacent network position to intercept signup traffic; the bounded impact is sensitive-data disclosure.

CVSS severity6.9
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in IBM Security Identity Governance and Intelligence 5.2.6 allows attackers to read sensitive data via MITM. The signup path in IBM Security Access Request apps validates a peer certificate incorrectly, but IBM has not disclosed the failed trust or hostname check. Exploitation requires unauthenticated attackers in an adjacent network position to intercept signup traffic; the bounded impact is sensitive-data disclosure.

The record

CVE
CVE-2020-4791
Published
Feb 9, 2021
Updated
Sep 16, 2024
Vendor
IBM
Product
IBM Security Identity Governance and Intelligence
Classifications
CWE-295, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 9, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.2.6

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

IBM · IBM Security Identity Governance and Intelligenceversion=5.2.6

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
1.8NIST NVDAV:A/AC:H/Au:N/C:P/I:N/A:N
6.9IBM CorporationCVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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