Vulnerability · Published Oct 13, 2026 · Assigned by microsoft
CVE-2026-70264Microsoft Defender Information Disclosure Vulnerability
Medium 5.5
In plain English
A medium-severity security flaw in Windows Defender from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.5%top 57.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to disclose information locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows Defender | 0 – before 1.1.26090.9 |
Weakness: CWE-59 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
References
- Microsoft Defender Information Disclosure Vulnerability vendor-advisory, patch