---
id: CVE-2026-96957
title: >-
  Improper verification of cryptographic signature in .NET allows an
  unauthorized attacker to bypass a security feature over a network.
summary: >-
  Improper verification of cryptographic signature in .NET allows an
  unauthorized attacker to bypass a security feature over a network.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-347
published: '2026-10-13'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T04:19:04.480'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-96957'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96957'
    label: secure@microsoft.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96957.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-96957'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2548813'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-96957'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-96957'
  - url: 'https://access.redhat.com/errata/RHSA-2026:86195'
  - url: 'https://access.redhat.com/errata/RHSA-2026:86192'
  - url: 'https://access.redhat.com/errata/RHSA-2026:86193'
  - url: 'https://access.redhat.com/errata/RHSA-2026:84491'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-10-13T19:43:29.286Z'
vendor: Microsoft
product: .NET 10.0
affected:
  - .net_10.0 >= 10.0.0 < 10.0.402
  - .net_11.0 >= 11.0.0 < 11.0.100-rc.2
  - visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.42
  - visual_studio_2026_version_18.10 >= 18.10.0 < 18.10.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-08T00:00:00+00:00'
epss: 0.00534
epssPercentile: 0.45215
patched:
  - enterprise_linux_appstream_v_10
  - enterprise_linux_appstream_v_8
  - enterprise_linux_appstream_v_9
  - enterprise_linux_codeready_linux_builder_v_10
  - enterprise_linux_crb_v_8
  - enterprise_linux_codeready_linux_builder_v_9
  - hardened_images
---

## Overview

Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **RHSA-2026:86195** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86195)
- **RHSA-2026:86192** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86192)
- **RHSA-2026:86193** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86193)
- **RHSA-2026:84491** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:84491)