CVE-2026-55706

EUVD-2026-37521
sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.8 MEDIUM
ADJACENT_NETWORK
HIGH
NONE
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 28%
Affected Products (NVD)
VendorProductVersion
openbsdopenbsd
𝑥
≤ 7.6
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://blog.argus-systems.ai/blog/openbsd-pap-27-year-auth-bypass.html
https://github.com/openbsd/src/commit/076e2b1c1fc4ac0883a72d3544131ad5cee7adf8
https://www.openwall.com/lists/oss-security/2026/06/16/9
https://blog.argus-systems.ai/blog/poc-001-pap-bypass.py