CVE-2026-55706

State: Published
Severity: 5.8 Medium
Published: Jun 17, 2026
Updated: Jun 17, 2026
Reserved: Jun 17, 2026

Description

sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.

Scores

CVSS	Score	Vector	Source
3.1	5.8 Medium	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L	mitre

Weaknesses

CWE-1284 Improper Validation of Specified Quantity in Input

Affected Products

Product	Versions
OpenBSDOpenBSD	before 076e2b1c1fc4ac0883a72d3544131ad5cee7adf8Affected

References

https://blog.argus-systems.ai/blog/openbsd-pap-27-year-auth-bypass.html
https://www.openwall.com/lists/oss-security/2026/06/16/9
https://github.com/openbsd/src/commit/076e2b1c1fc4ac0883a72d3544131ad5cee7adf8
https://blog.argus-systems.ai/blog/poc-001-pap-bypass.pyexploit

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