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Vulnerability record · CVE-2026-55706 · published 17 June 2026

CVE-2026-55706: Openbsd vulnerability

Openbsd · Openbsd

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

8.3 CVSS 3.1 High EPSS 0.34% · top 74.6% CWE-1284 · CWE-1284
8.3CVSS 3.1 base score
0.34%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 3 tagged exploit
13 Jul 2026Last modified by NVD

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://blog.argus-systems.ai/blog/openbsd-pap-27-year-auth-bypass.html Third Party AdvisoryExploit
https://github.com/openbsd/src/commit/076e2b1c1fc4ac0883a72d3544131ad5cee7adf8 Patch
https://www.openwall.com/lists/oss-security/2026/06/16/9 ExploitMailing ListPatchThird Party Advisory
https://blog.argus-systems.ai/blog/poc-001-pap-bypass.py Exploit

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-55706), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.