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CVE-2020-7247 OpenBSD CVE debrief

CVE-2020-7247 is an OpenBSD OpenSMTPD remote code execution vulnerability that CISA lists in its Known Exploited Vulnerabilities catalog. Because it is documented as known exploited, organizations running OpenSMTPD should treat it as a patch-now issue and verify that vendor-recommended updates have been applied.

Vendor
OpenBSD
Product
OpenSMTPD
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-03-25
Original CVE updated
2022-03-25
Advisory published
2022-03-25
Advisory updated
2022-03-25

Who should care

Organizations running OpenBSD OpenSMTPD, especially teams responsible for internet-facing mail services, system administration, vulnerability management, and incident response.

Technical summary

The supplied corpus identifies the issue as a remote code execution vulnerability in OpenBSD OpenSMTPD and confirms that CISA has added it to the Known Exploited Vulnerabilities catalog. No additional root-cause, precondition, or exploit-path details are provided in the source set, so the safest defensive interpretation is that affected OpenSMTPD deployments should be updated immediately per vendor instructions and reviewed for exposure.

Defensive priority

Urgent

Recommended defensive actions

  • Apply updates per vendor instructions.
  • Inventory systems running OpenSMTPD and confirm whether any affected versions are deployed.
  • Prioritize remediation for internet-facing or externally reachable mail servers.
  • If patching is delayed, restrict exposure to the service until updates can be applied.
  • Review monitoring and alerting for unusual activity on affected mail systems.
  • Validate that vulnerability and configuration management records reflect remediation status.

Evidence notes

This debrief is based on the supplied CISA Known Exploited Vulnerabilities entry and the official CVE/NVD resource links. The corpus provides the CVE identity, vendor/product mapping, and KEV status, but does not include CVSS, exploit mechanics, or deeper technical analysis. Timing context follows the supplied published/modified dates and KEV date-added/due-date fields; no generation or review time is treated as the issue date.

Official resources

CISA lists CVE-2020-7247 in its Known Exploited Vulnerabilities catalog, indicating known exploitation. The supplied source set does not provide exploit code, reproduction steps, or a CVSS score.