{"id":"CVE-2026-55706","title":"sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.","summary":"sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.","severity":"medium","cvss":5.8,"cvssVector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L","cwe":["CWE-1284"],"vendor":"openbsd","product":"openbsd","affected":["openbsd <= 7.6"],"published":"2026-06-17","updated":"2026-07-13","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55706","references":[{"url":"https://blog.argus-systems.ai/blog/openbsd-pap-27-year-auth-bypass.html","label":"cve@mitre.org"},{"url":"https://github.com/openbsd/src/commit/076e2b1c1fc4ac0883a72d3544131ad5cee7adf8","label":"cve@mitre.org"},{"url":"https://www.openwall.com/lists/oss-security/2026/06/16/9","label":"cve@mitre.org"},{"url":"https://blog.argus-systems.ai/blog/poc-001-pap-bypass.py","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00354,"epssPercentile":0.292,"ingestedAt":"2026-07-13T14:27:26.762Z","slug":"CVE-2026-55706","body":"## Overview\n\nsppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.\n\n## Affected\n\n- `openbsd <= 7.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":31.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}