CVE-2026-32177
published 2026-05-12CVE-2026-32177: Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
PriorityP345high7.3CVSS 3.1
AVLACLPRNUIRSUCHIHAL
EPSS
0.55%
42.4th percentile
Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
Affected
25 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_net_framework_3.5 | >= 3.5.0 < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| microsoft | microsoft_net_framework_3.5_and_4.7.2 | >= 4.7.0 < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| microsoft | microsoft_net_framework_3.5_and_4.8 | >= 4.8.0 < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| microsoft | microsoft_net_framework_3.5_and_4.8.1 | >= 4.8.1 < 4.8.9334.0 and 4.8.4802.0 | 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 < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| microsoft | microsoft_net_framework_4.8 | >= 4.8.0 < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| microsoft | microsoft_visual_studio_2022_version_17.12 | >= 17.12.0 < 17.12.20 | 17.12.20 |
| microsoft | microsoft_visual_studio_2022_version_17.14 | >= 17.14.0 < 17.14.32 | 17.14.32 |
| microsoft | microsoft_visual_studio_2026_version_18.5 | >= 18.5.0 < 18.5.3 | 18.5.3 |
| microsoft | net | >= 10.0.0 < 10.0.8 | 10.0.8 |
| microsoft | net | >= 8.0.0 < 8.0.27 | 8.0.27 |
| microsoft | net | >= 9.0.0 < 9.0.16 | 9.0.16 |
| microsoft | net_10.0 | >= 10.0.0 < 10.0.8 | 10.0.8 |
| microsoft | net_8.0 | >= 8.0.0 < 8.0.27 | 8.0.27 |
| microsoft | net_9.0 | >= 9.0.0 < 9.0.16 | 9.0.16 |
| microsoft | net_framework | — | — |
| microsoft | net_framework | — | — |
| microsoft | net_framework | — | — |
| microsoft | net_framework | — | — |
| microsoft | net_framework | — | — |
| microsoft | net_framework | — | — |
| microsoft | net_framework | — | — |
| microsoft | visual_studio_2022 | >= 17.12.0 < 17.12.20 | 17.12.20 |
| microsoft | visual_studio_2022 | >= 17.14.0 < 17.14.32 | 17.14.32 |
| microsoft | visual_studio_2026 | >= 18.5.0 < 18.5.3 | 18.5.3 |
CVSS provenance
nvdv3.17.3HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
vendor_redhat7.3HIGH
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Red Hat
dotnet: .NET: heap-based buffer overflow allows an attacker to elevate privileges locally
vendor_redhat·2026-05-12·CVSS 7.3
CVE-2026-32177 [HIGH] CWE-122 dotnet: .NET: heap-based buffer overflow allows an attacker to elevate privileges locally
dotnet: .NET: heap-based buffer overflow allows an attacker to elevate privileges locally
Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
A flaw was found in dotnet. A heap-based buffer overflow in .NET allows an unauthenticated attacker to elevate privileges locally.
Statement: As this flaw allows an unauthenticated attacker to elevate privileges locally, it has been rated with an important severity.
Mitigation: Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.
Package: dotnet10.0 (Red Hat Enterprise Linux 10) - Under investigation
Package: dotnet8.0 (Red Hat Enterprise Linux 10) - Under investiga
VulDB
Microsoft .NET prior 10.0.8 heap-based overflow (Nessus ID 314680)
vuldb·2026-06-21·CVSS 7.3
CVE-2026-32177 [HIGH] Microsoft .NET prior 10.0.8 heap-based overflow (Nessus ID 314680)
A vulnerability has been found in Microsoft .NET and classified as problematic. Affected by this vulnerability is an unknown functionality. This manipulation causes heap-based buffer overflow.
This vulnerability is handled as CVE-2026-32177. It is possible to launch the attack on the local host. There is not any exploit available.
The affected component should be upgraded.
No detection rules found.
No public exploits indexed.
Rapid7
Patch Tuesday - May 2026
blogs_rapid7·2026-05-13·CVSS 10.0
CVE-2026-41089 [CRITICAL] Patch Tuesday - May 2026
Microsoft is publishing 137 vulnerabilities on May 2026 Patch Tuesday . Microsoft is not aware of exploitation in the wild or public disclosure for any of these vulnerabilities. So far this month, Microsoft has provided patches to address 133 browser vulnerabilities, which are not included in the Patch Tuesday count above.
## Windows Netlogon: critical RCE
Anyone responsible for securing a domain controller should prioritize remediation of CVE-2026-41089 , which is a critical stack-based buffer overflow in Windows Netlogon with a CVSS v3 base score of 9.8. Exploitation leads to execution in the context of the Netlogon service, so that’s SYSTEM privileges on the domain controller. For most pentesters, that’s the point at which the customer report more or less writes itself. No privileges
Sans Isc
Microsoft May 2026 Patch Tuesday, (Tue, May 12th)
blogs_sans_isc·2026-05-12·CVSS 4.3
CVE-2026-41103 [MEDIUM] Microsoft May 2026 Patch Tuesday, (Tue, May 12th)
Microsoft May 2026 Patch Tuesday
Published: 2026-05-12. Last Updated: 2026-05-12 18:29:36 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
Today's Microsoft patch Tuesday fixes 137 different vulnerabilities. In addition, the update addresses 137 Chromium-related issues affecting Microsoft Edge.
There are no already disclosed or already exploited vulnerabilities included in today's patches. I removed the Chromium issues from the table below and included only the 137 Microsoft issues to make it more readable.
Note that issues related to Microsoft Azure are labeled as "no customer action required.
Significant Vulnerabilities of interest:
CVE-2026-41103: This vulnerability affects the Microsoft SSO Plugin for Jira & Confluence. Exploitation could lead to an elevation of privileges. Wit
Bugzilla
CVE-2026-32177 dotnet: .NET: heap-based buffer overflow allows an attacker to elevate privileges locally
bugzilla·2026-05-12·CVSS 7.3
CVE-2026-32177 [HIGH] CVE-2026-32177 dotnet: .NET: heap-based buffer overflow allows an attacker to elevate privileges locally
CVE-2026-32177 dotnet: .NET: heap-based buffer overflow allows an attacker to elevate privileges locally
Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
2026-05-12
Published