---
cve: "CVE-2026-55706"
severity: "MEDIUM"
cvss: 5.8
epss: "35%"
vendor: "OpenBSD"
kev: false
exploited: false
published: "2026-06-17 13:20:52"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-05T02:57:49+02:00"
---

# CVE-2026-55706

> 5.8 MEDIUM · 🧪 PoC

## Beschreibung

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

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Benachbart | warn |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- 076e2b1c1fc4ac0883a72d3544131ad5cee7adf8 (Commit)

## Referenzen

- <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.py>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55706) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_