CVE-2026-55706 — MEDIUM (5.8)

Q: What is CVE-2026-55706?

CVE-2026-55706 is a vulnerability with a CVSS score of 5.8 (MEDIUM). sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.

Q: How severe is CVE-2026-55706?

CVE-2026-55706 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-55706?

Check the references section above for vendor advisories and patch information. Affected products include: Openbsd Openbsd.

Vulnerability Description

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

CVSS Score

5.8

MEDIUM

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L

Attack Vector

ADJACENT_NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

LOW

Affected Products

Vendor	Product	Versions
Openbsd	Openbsd	<= 7.6

Related Weaknesses (CWE)

CWE-1284

References

https://blog.argus-systems.ai/blog/openbsd-pap-27-year-auth-bypass.htmlThird Party AdvisoryExploit
https://github.com/openbsd/src/commit/076e2b1c1fc4ac0883a72d3544131ad5cee7adf8Patch
https://www.openwall.com/lists/oss-security/2026/06/16/9ExploitMailing ListPatch
https://blog.argus-systems.ai/blog/poc-001-pap-bypass.pyExploit

FAQ

What is CVE-2026-55706?

CVE-2026-55706 is a vulnerability with a CVSS score of 5.8 (MEDIUM). sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.

How severe is CVE-2026-55706?

CVE-2026-55706 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-55706?

Check the references section above for vendor advisories and patch information. Affected products include: Openbsd Openbsd.