FKIE_CVE-2026-55706

Vulnerability from fkie_nvd - Published: 2026-06-17 13:20 - Updated: 2026-07-13 13:54
Severity
5.8 (Medium) - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
8.3 (High) - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Summary
sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.
References
cve@mitre.orghttps://blog.argus-systems.ai/blog/openbsd-pap-27-year-auth-bypass.htmlThird Party Advisory, Exploit
cve@mitre.orghttps://github.com/openbsd/src/commit/076e2b1c1fc4ac0883a72d3544131ad5cee7adf8Patch
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2026/06/16/9Exploit, Mailing List, Patch, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://blog.argus-systems.ai/blog/poc-001-pap-bypass.pyExploit
Impacted products
Vendor Product Version
openbsd openbsd *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenBSD",
          "vendor": "OpenBSD",
          "versions": [
            {
              "lessThan": "076e2b1c1fc4ac0883a72d3544131ad5cee7adf8",
              "status": "affected",
              "version": "0",
              "versionType": "git"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "75D44F13-0468-4BCE-B3E9-58FFF313431F",
              "versionEndIncluding": "7.6",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths."
    }
  ],
  "id": "CVE-2026-55706",
  "lastModified": "2026-07-13T13:54:22.863",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 3.7,
        "source": "cve@mitre.org",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 6.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-55706",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-17T14:32:57.493186Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-17T13:20:52.117",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory",
        "Exploit"
      ],
      "url": "https://blog.argus-systems.ai/blog/openbsd-pap-27-year-auth-bypass.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openbsd/src/commit/076e2b1c1fc4ac0883a72d3544131ad5cee7adf8"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Mailing List",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://www.openwall.com/lists/oss-security/2026/06/16/9"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit"
      ],
      "url": "https://blog.argus-systems.ai/blog/poc-001-pap-bypass.py"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1284"
        }
      ],
      "source": "cve@mitre.org",
      "type": "Secondary"
    }
  ]
}



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