Vulnerability in Networkupstools Nut
CVE-2026-85068
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.
Published .
CVSS v3 metric
CVSS v3 base score 2.4 (Low). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Networkupstools Nut — versions >= 2.4.2, <= 2.8.5
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-85068?
- CVE-2026-85068 is a low-severity vulnerability in Networkupstools Nut, classified under CWE-457. CVSS score: 2.4/10. Published 2026-11-05.
- How severe is CVE-2026-85068?
- Low severity. CVSS v3 base score is 2.4 out of 10.