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Vulnerabilities

Vulnerability · CVE-2021-20191

A flaw was found in ansible.

Published May 26, 2021 · catalog updated Jun 17, 2026 · A flaw was found

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2021-20191. EPSS is 0.35%. Act only if a listed version of A flaw was found is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A flaw was found).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.35%
Remediation
Version ranges on file
Affected products
cpe oracle/virtualization · cpe redhat/ansible · cpe redhat/ansible tower · cpe redhat/cisco nx-os collection

A flaw was found in ansible. Credentials, such as secrets, are being disclosed in console log by default and not protected by no_log feature when using those modules. An attacker can take advantage of this information to steal those credentials. The highest threat from this vulnerability is to data confidentiality. Versions before ansible 2.9.18 are affected.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe oracle/virtualization4.0
  • cpe redhat/ansible< 2.10.7
  • cpe redhat/ansible< 2.8.19
  • cpe redhat/ansible< 2.9.18
  • cpe redhat/ansible tower3.0
  • cpe redhat/cisco nx-os collection< 1.4.0

How to fix CVE-2021-20191

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-20191. EPSS is 0.35%. Act only if a listed version of A flaw was found is installed.

Which versions are affected?

Compare what you have installed with redhat/ansible tower 3.0; redhat/cisco nx-os collection < 1.4.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-532: Insertion of Sensitive Information into Log File. EPSS 0.35%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Ansible securityCisco security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 26, 2021 · Monitored products — high

    Detected

    A flaw was found in ansible. Credentials, such as secrets, are being disclosed in console log by default and not protected by no_log feature when using those modules. An attacker can take advantage of this information to steal those credentials. The highest threat from this vulnerability is to data confidentiality. Versions before ansible 2.9.18 are affected.

  2. Jun 17, 2026 · Monitored products — high

    Updated

    A flaw was found in ansible. Credentials, such as secrets, are being disclosed in console log by default and not protected by no_log feature when using those modules. An attacker can take advantage of this information to steal those credentials. The highest threat from this vulnerability is to data confidentiality. Versions before ansible 2.9.18 are affected.

Sources

  • CVE.orgVulnerability recordCVE-2021-20191

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-20191

    30-day exploitation probability 0.35%

    first.org
  • Monitored products — highVendor advisoryCVE-2021-20191

    A flaw was found in ansible. Credentials, such as secrets, are being disclosed in console log by default and not protected by no_log feature when using those modules. An attacker can take advantage of this information to steal those credentials. The highest threat from this vulnerability is to data confidentiality. Versions before ansible 2.9.18 are affected.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • FIRST EPSSNov 3, 2026
  • Monitored products — highNov 2, 2026