{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "3.8.0"
              },
              {
                "fixed": "3.10.0"
              }
            ]
          },
          "events": [
            {
              "introduced": "d38595e7e14e7509e744d33df657d50d00cc201f"
            },
            {
              "fixed": "6ff8f38a6d55970af1400cc78994e017ca351c39"
            },
            {
              "fixed": "4350a11c663b0d75f8119743bffb7736d87abd4d"
            }
          ],
          "repo": "https://github.com/inspircd/inspircd",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "InspIRCd 3.8.0 through 3.9.x before 3.10.0 allows any user (able to connect to the server) to access recently deallocated memory, aka the \"malformed PONG\" issue.",
  "id": "CVE-2021-33586",
  "modified": "2026-03-14T13:49:55.393114650Z",
  "published": "2021-05-27T05:15:06.993Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security.gentoo.org/glsa/202107-22"
    },
    {
      "type": "FIX",
      "url": "https://docs.inspircd.org/security/2021-01/"
    },
    {
      "type": "FIX",
      "url": "https://github.com/inspircd/inspircd/commit/4350a11c663b0d75f8119743bffb7736d87abd4d"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}