CVE-2021-22506Known exploitationNetwork attack vector

Unauthenticated information disclosure via ACS URL redirection

Published Mar 26, 2021 · Updated Oct 21, 2025

Information disclosure in NetIQ Access Manager before 5.0 allows remote attackers to obtain sensitive data through SAML redirection. The SAML service provider redirects using an Assertion Consumer Service URL under an advanced configuration; OpenText has not disclosed how validation fails. Network access without authentication is sufficient, and the documented consequence is disclosure rather than data modification or service interruption.

CVSS severity7.5
High
EPSS probability25.70%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in NetIQ Access Manager before 5.0 allows remote attackers to obtain sensitive data through SAML redirection. The SAML service provider redirects using an Assertion Consumer Service URL under an advanced configuration; OpenText has not disclosed how validation fails. Network access without authentication is sufficient, and the documented consequence is disclosure rather than data modification or service interruption.

The record

CVE
CVE-2021-22506
Published
Mar 26, 2021
Updated
Oct 21, 2025
Vendor
OpenText
Product
NetIQ Access Manager
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record 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=All version prior version 5.0.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenText · NetIQ Access Managerversion=All version prior version 5.0.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Reported exploitation

Technologies

Your stack

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Your stack

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