Vulnerability · Published May 12, 2026 · Assigned by microsoft
CVE-2026-32177.NET Elevation of Privilege Vulnerability
High 7.3
In plain English
A high-severity heap buffer overflow in Microsoft .NET Framework 3.5 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.6%top 49.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | dotnet10-runtime | 10.0.8-r0 | ALPINE-CVE-2026-32177 |
| Alpine:v3.24 | dotnet10-runtime | 10.0.8-r0 | ALPINE-CVE-2026-32177 |
| Alpine:v3.21 | dotnet8-runtime | 8.0.27-r0 | ALPINE-CVE-2026-32177 |
| Alpine:v3.22 | dotnet8-runtime | 8.0.27-r0 | ALPINE-CVE-2026-32177 |
| Alpine:v3.23 | dotnet8-runtime | 8.0.27-r0 | ALPINE-CVE-2026-32177 |
| Alpine:v3.24 | dotnet8-runtime | 8.0.27-r0 | ALPINE-CVE-2026-32177 |
| Alpine:v3.21 | dotnet9-runtime | 9.0.16-r0 | ALPINE-CVE-2026-32177 |
| Alpine:v3.22 | dotnet9-runtime | 9.0.16-r0 | ALPINE-CVE-2026-32177 |
| Alpine:v3.23 | dotnet9-runtime | 9.0.16-r0 | ALPINE-CVE-2026-32177 |
| Alpine:v3.24 | dotnet9-runtime | 9.0.16-r0 | ALPINE-CVE-2026-32177 |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-32177 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET 10.0 | 10.0.0 – before 10.0.8 |
| Microsoft | .NET 8.0 | 8.0.0 – before 8.0.27 |
| Microsoft | .NET 9.0 | 9.0.0 – before 9.0.16 |
| Microsoft | Microsoft .NET Framework 3.5 | 3.5.0 – before 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.7.2 | 4.7.0 – before 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 | 4.8.0 – before 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 | 4.8.1 – before 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 | 4.7.0 – before 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 4.8 | 4.8.0 – before 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft Visual Studio 2022 version 17.12 | 17.12.0 – before 17.12.20 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – before 17.14.32 |
| Microsoft | Microsoft Visual Studio 2026 version 18.5 | 18.5.0 – before 18.5.3 |
Weakness: CWE-122, CWE-20 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C
References
- .NET Elevation of Privilege Vulnerability vendor-advisory, patch
- https://access.redhat.com/security/cve/CVE-2026-32177 vdb-entry, x_refsource_REDHAT
- RHBZ#2476664 issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32177.json x_sadp-csaf-vex