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Vulnerabilities

Threat intelligence · CVE-2021-23017

Boletín de seguridad: IBM API Connect V5 se ve afectado por una vulnerabilidad en nginx.

Published Aug 30, 2021 · the affected product

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2021-23017 is not in CISA KEV. FIRST estimates a 53.46% chance of exploitation in the next 30 days. Check whether you run the affected product.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • 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
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
53.46%
Remediation
Not established
Affected products
See sources for product scope

Boletín de seguridad: IBM API Connect V5 se ve afectado por una vulnerabilidad en nginx. (CVE-2021-23017) NGINX podría permitir que un atacante remoto ejecute código arbitrario en el sistema, causado por un error de uno en uno en ngx_resolver_copy () mientras procesa las respuestas de DNS. Al enviar una solicitud especialmente diseñada, un atacante podría aprovechar esta vulnerabilidad para ejecutar código arbitrario

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2021-23017

  • No stored fix

    No vendor fix text is stored. Use the linked advisory before you change production.

  • Version check

    No version range is stored, so an installed version cannot be checked on this page.

  • Official advisories

What to do

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

Should you patch?

CVE-2021-23017 is not in CISA KEV. FIRST estimates a 53.46% chance of exploitation in the next 30 days. Check whether you run the affected product.

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?

No weakness class is stored. EPSS 53.46%. 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 30, 2021 · AlienVault OTX

    Detected

    Boletín de seguridad: IBM API Connect V5 se ve afectado por una vulnerabilidad en nginx. (CVE-2021-23017) NGINX podría permitir que un atacante remoto ejecute código arbitrario en el sistema, causado por un error de uno en uno en ngx_resolver_copy () mientras procesa las respuestas de DNS. Al enviar una solicitud especialmente diseñada, un atacante podría aprovechar esta vulnerabilidad para ejecut

Sources

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • AlienVault OTXNov 1, 2026