What’s Vulnerable › Vulnerabilities

CVE-2026-55706

• Severity: high (CVSS 8.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-06-17 · updated 2026-07-13
• Weakness: CWE-1284

Description

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

Affected products

• OpenBSD: through 7.6

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

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