Login Request a demo
High severity · published Oct 13, 2026
CVE-2026-108398
.NET Framework Security Feature Bypass Vulnerability
8.8
CVSS
0.8%
EPSS
No
On KEV
Description
Untrusted search path in .NET Framework allows an authorized attacker to bypass a security feature locally.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MN
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 · Microsoft
3.0.0.0 before 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.7.2 · Microsoft
4.7.0 before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.8 · Microsoft
4.8.0 before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.8.1 · Microsoft
4.8.1 before 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 · source: vendor
MN
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 · Microsoft
4.7.0 before 4.7.4150.0 · source: vendor
MN
Microsoft .NET Framework 4.8 · Microsoft
4.8.0 before 4.8.4811.0 · source: vendor
MN
Microsoft .NET Framework 4.8.1 · Microsoft
4.8.0.0 before 4.8.9363.0 · source: vendor
Affected product
MN
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
Microsoft
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-108398
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-108398
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108398
More from Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
8.8
CVE-2026-102869
.NET and Visual Studio Elevation of Privilege Vulnerability
8.8
CVE-2026-85363
.NET Framework Elevation of Privilege Vulnerability
8.8
CVE-2026-83520
.NET Remote Code Execution Vulnerability
8.8
CVE-2026-70035
.NET Framework Remote Code Execution Vulnerability
8.8
CVE-2026-70007
.NET Framework Remote Code Execution Vulnerability