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UK Cyber Defence
VulnerabilityAwaiting Analysis

CVE-2026-70116

Stack-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker to bypass a security feature with a physical attack.

MEDIUM 4.2EPSS 0.37%

Does this matter?

Lower severity and a low EPSS score (0.37%). Track it; it rarely justifies an emergency change on its own.

Description

Stack-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker to bypass a security feature with a physical attack.

CVSS 3.1
4.2 MEDIUMCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
0.37% probability · 30th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-121
Source
secure@microsoft.com
EPSS trend
0%3%5%14 October 2026: 0.32%26 October 2026: 0.37%14 October 202626 October 2026

EPSS moved from 0.3% on 14 October 2026 to 0.4% on 26 October 2026.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.