Exploitation timeline
Threadlinqs has recorded 5 OpenBSD CVEs published between and . The busiest month was 2026-06 (2 new CVEs). None of them is listed in CISA KEV yet.
Most exploited vulnerabilities
Ranked with CISA KEV listings first, then EPSS exploit probability, then CVSS score. Showing 5 of 5 tracked OpenBSD CVEs.
- CVE-2023-48795medium 5.9EPSS 93.5%
- CVE-2016-6210medium 5.9EPSS 88.9%
- CVE-2026-123158high 8.1EPSS 1%
- CVE-2026-55706medium 5.8EPSS 0.2%
- CVE-2026-57589high 7.4EPSS 0.2%
Products affected
Threadlinqs normalises CPE and CNA product records across all 5 CVEs; 2 distinct OpenBSD products are affected. The most frequently affected:
- Openssh 3 CVEs
- OpenBSD 2 CVEs
Threat activity
5 tracked threat campaigns reference OpenBSD products or exploit OpenBSD CVEs:
- Siemens SSA-364175: Multiple Vulnerabilities in Palo Alto Networks Virtual NGFW on RUGGEDCOM APE1808 (CVE-2024-3596, CVE-2025-4231 and others)CRITICAL
- OpenSSH on musl libc (Alpine Linux) authentication bypass via overly long password ("*sshole")CRITICAL
- OpenBSD 8.0 Released With PF Firewall Hardening and Critical Vulnerability Fixes (incl. IPsec AES-GMAC Kernel Heap Overflow Erratum 003, CVE-2026-31912)MEDIUM
- OpenBSD 7.9 Root Exploit ("Big Fish") Chaining 37-Year-Old shmat(4) Integer Overflow with sysvipc Kernel Use-After-Free (No CVE Assigned)HIGH
- CVE-2026-55706: 27-Year-Old OpenBSD sppp(4) PAP Authentication Bypass in sppp_pap_input()MEDIUM
How to prioritise OpenBSD patching
This order follows the data Threadlinqs holds for OpenBSD, not a generic severity checklist:
- No OpenBSD CVE is in CISA KEV yet, so rank by exploit probability instead.
- Outside KEV, the highest EPSS scores are CVE-2023-48795 (93.5%), CVE-2016-6210 (88.9%), CVE-2026-123158 (1%).
- 0 CVEs score Critical and 2 High on CVSS v3 (maximum 8.1, average 6.6); sequence these after KEV and high-EPSS items.
- 4 CVEs have a public exploit or proof of concept recorded, which shortens the time from disclosure to attack.
About this data
Vendor attribution comes from the CNA and CPE product records of each CVE, folded to one vendor name; CVSS, EPSS and KEV status are read from the Threadlinqs CVE catalog; campaign and actor links come from tracked threat records. Counts reflect the data as of 2026-11-09 and refresh daily.