VulnerabilityAnalyzed
CVE-2026-55706
sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.
HIGH 8.3EPSS 0.35%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.
- CVSS 3.1
- 8.3 HIGHCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.35% probability · 29th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-1284
- Affected
- openbsd/openbsd
- Source
- cve@mitre.org
References
- https://blog.argus-systems.ai/blog/openbsd-pap-27-year-auth-bypass.htmlThird Party Advisory, Exploit
- https://github.com/openbsd/src/commit/076e2b1c1fc4ac0883a72d3544131ad5cee7adf8Patch
- https://www.openwall.com/lists/oss-security/2026/06/16/9Exploit, Mailing List, Patch, Third Party Advisory
- https://blog.argus-systems.ai/blog/poc-001-pap-bypass.pyExploit
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.