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Vulnerabilities

Vulnerability · CVE-2021-22926

libcurl-using applications can ask for a specific client certificate to be used in a transfer.

Published Aug 5, 2021 · catalog updated Oct 14, 2026 · libcurl-using applications can ask

Check this week

CVE-2021-22926 is not in CISA KEV. FIRST estimates a 15.14% chance of exploitation in the next 30 days. Check whether you run libcurl-using applications can ask.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (libcurl-using applications can ask).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
15.14%
Remediation
Advisory link
Affected products
cpe haxx/curl · cpe netapp/active iq unified manager · cpe netapp/clustered data ontap · cpe netapp/h300e firmware · cpe netapp/h300s firmware · cpe netapp/hci management node

libcurl-using applications can ask for a specific client certificate to be used in a transfer. This is done with the option ( with the command line tool).When libcurl is built to use the macOS native TLS library Secure Transport, an application can ask for the client certificate by name or with a file name - using the same option. If the name exists as a file, it will be used instead of by name.If the appliction runs with a current working directory that is writable by other users (like ), a malicious user can create a file name with the same name as the app wants to use by name, and thereby trick the application to use the file based cert instead of the one referred to by name making libcurl send the wrong client certificate in the TLS connection handshake.

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 haxx/curlversion unspecified
  • cpe netapp/active iq unified managerversion unspecified
  • cpe netapp/clustered data ontapversion unspecified
  • cpe netapp/h300e firmwareversion unspecified
  • cpe netapp/h300s firmwareversion unspecified
  • cpe netapp/hci management nodeversion unspecified
  • cpe netapp/oncommand insightversion unspecified
  • cpe netapp/oncommand workflow automationversion unspecified
  • cpe netapp/snapcenterversion unspecified
  • cpe oracle/mysql serverversion unspecified
  • cpe siemens/sinec infrastructure network servicesversion unspecified

How to fix CVE-2021-22926

What to do

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

Should you patch?

CVE-2021-22926 is not in CISA KEV. FIRST estimates a 15.14% chance of exploitation in the next 30 days. Check whether you run libcurl-using applications can ask.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-295: Improper Certificate Validation; CWE-840. EPSS 15.14%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

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. Aug 5, 2021 · NIST NVD

    Detected

    libcurl-using applications can ask for a specific client certificate to be used in a transfer. This is done with the option ( with the command line tool).When libcurl is built to use the macOS native TLS library Secure Transport, an application can ask for the client certificate by name or with a file name - using the same option. If the name exists as a file, it will be used instead of by name.If

  2. Oct 14, 2026 · NIST NVD

    Updated

    libcurl-using applications can ask for a specific client certificate to be used in a transfer. This is done with the option ( with the command line tool).When libcurl is built to use the macOS native TLS library Secure Transport, an application can ask for the client certificate by name or with a file name - using the same option. If the name exists as a file, it will be used instead of by name.If

Sources

  • CVE.orgVulnerability recordCVE-2021-22926

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-22926

    30-day exploitation probability 15.1%

    first.org
  • NIST NVDVulnerability recordCVE-2021-22926

    libcurl-using applications can ask for a specific client certificate to be used in a transfer. This is done with the option ( with the command line tool).When libcurl is built to use the macOS native TLS library Secure Transport, an application can ask f

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.