CVE-2026-85068

Full vulnerability record from the local CVENow database.

Description

Network UPS Tools is a collection of programs which provide a common interface for monitoring and administering UPS, PDU and SCD hardware. From 2.4.2 through 2.8.5, ippon_command in drivers/blazer_usb.c partially initializes char tmp[64] with a short Megatec status query and then passes a fixed eight-byte chunk to usb_control_msg. A malicious firmware-controlled USB device presenting the Mustek Powermust VID 0x06da and Mustek Powermust PID 0x0003 matches blazer_usb_id, selects ippon_subdriver, and can receive the uninitialized trailing stack bytes during normal polling. The disclosure is bounded and read-only, requires physical or supply-chain access to the USB bus, and has no established integrity or availability impact. This issue is scheduled to be fixed in version 2.8.6.

Severity

LOW

CVSS score

2.4 (v3.1)

Vulnerability status

Received

Source identifier

[email protected]

Published

2026-11-05 23:17:00.947000

Last modified

2026-11-05 23:17:00.947000

View original CVE JSON

{
  "id": "CVE-2026-85068",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-05T23:17:00.947",
  "lastModified": "2026-11-05T23:17:00.947",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Network UPS Tools is a collection of programs which provide a common interface for monitoring and administering UPS, PDU and SCD hardware. From 2.4.2 through 2.8.5, ippon_command in drivers/blazer_usb.c partially initializes char tmp[64] with a short Megatec status query and then passes a fixed eight-byte chunk to usb_control_msg. A malicious firmware-controlled USB device presenting the Mustek Powermust VID 0x06da and Mustek Powermust PID 0x0003 matches blazer_usb_id, selects ippon_subdriver, and can receive the uninitialized trailing stack bytes during normal polling. The disclosure is bounded and read-only, requires physical or supply-chain access to the USB bus, and has no established integrity or availability impact. This issue is scheduled to be fixed in version 2.8.6."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "networkupstools",
          "product": "nut",
          "versions": [
            {
              "version": ">= 2.4.2, <= 2.8.5",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "baseScore": 2.4,
          "baseSeverity": "LOW",
          "attackVector": "PHYSICAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 1.4
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-457"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/networkupstools/nut/commit/30d56d4282f823949b40763d5c76461c7dd107b3",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/networkupstools/nut/pull/3529",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/networkupstools/nut/security/advisories/GHSA-fjxc-2vpv-mqc8",
      "source": "[email protected]"
    }
  ]
}