ZeusQA
Start free

Known exploited vulnerabilities

OpenBSD vulnerabilities attackers have used

Every OpenBSD vulnerability in CISA's Known Exploited Vulnerabilities catalog, newest first, with the federal due date and whether it fed ransomware campaigns.

The short answer

CISA lists 2 OpenBSD vulnerabilities as exploited in the wild, 1 of them added in the last 12 months. The most recent is CVE-2026-123158, added Nov 9, 2026. OpenSMTPD has the most entries (1).

In KEV, all time
2
Added, last 12 months
1
Used in ransomware
0
New CVEs this week
0

By product

OpenSMTPD (1), OpenSSH (1).

Every OpenBSD entry in CISA KEV

  1. CVE-2026-123158

    Added · due

    OpenBSD OpenSSH Unexpected Status Code or Return Value Vulnerability

    OpenBSD OpenSSH on Linux contains an unexpected status code or return value vulnerability that could allow for authentication bypass.

  2. CVE-2020-7247

    Added · due

    OpenSMTPD Remote Code Execution Vulnerability

    smtp_mailaddr in smtp_session.c in OpenSMTPD, as used in OpenBSD and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session.

Related

Know the day a CVE lands in your code

Connect a GitHub repository and ZeusQA checks its dependencies daily, briefs each advisory and opens the fix. Three test runs free, no card.

Start freeSee how a run works