PatchTheCVECVE-2026-96957: Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security
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HIGH 8.8WATCHLISTUPGRADEUPGRADEUPGRADE
CVE-2026-96957 is a high-severity flaw (CVSS 8.8) affecting .net, visual studio 2022, visual studio 2026. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.
Why this priority
- High severity
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.4% (top 62%) |
| CISA exploited list | No |
| Weakness | CWE-347 |
| Published | 2026-10-13 |
| Last modified | 2026-10-22 |
Publisher (CNA): Microsoft Corporation · Vendor: microsoft
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
microsoft .net UPGRADE
Affected: >= 10.0.0 and < 10.0.13 · 11.0.0 preview1 · 11.0.0 preview2 · 11.0.0 preview3 · 11.0.0 preview4 · 11.0.0 preview5 · 11.0.0 preview6 · 11.0.0 preview7
Fixed in: 10.0.13
Safe to downgrade to: a release before 10.0.0
1. Check installed version
apt-cache policy .net || rpm -q .net || .net --version
2. UPGRADE to 10.0.13 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade .net
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade .net
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 10.0.0 (Debian / Ubuntu)
apt-cache madison .net
sudo apt install .net=<VERSION_BEFORE_10.0.0>
sudo apt-mark hold .net
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list .net
sudo dnf downgrade .net-<VERSION_BEFORE_10.0.0>
sudo dnf versionlock add .net
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
microsoft visual studio 2022 UPGRADE
Affected: >= 17.14.0 and < 17.14.42
Fixed in: 17.14.42
Safe to downgrade to: a release before 17.14.0
1. Check installed version
apt-cache policy visual-studio-2022 || rpm -q visual-studio-2022 || visual-studio-2022 --version
2. UPGRADE to 17.14.42 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade visual-studio-2022
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade visual-studio-2022
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 17.14.0 (Debian / Ubuntu)
apt-cache madison visual-studio-2022
sudo apt install visual-studio-2022=<VERSION_BEFORE_17.14.0>
sudo apt-mark hold visual-studio-2022
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list visual-studio-2022
sudo dnf downgrade visual-studio-2022-<VERSION_BEFORE_17.14.0>
sudo dnf versionlock add visual-studio-2022
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
microsoft visual studio 2026 UPGRADE
Affected: >= 18.10.0 and < 18.10.4
Fixed in: 18.10.4
Safe to downgrade to: a release before 18.10.0
1. Check installed version
apt-cache policy visual-studio-2026 || rpm -q visual-studio-2026 || visual-studio-2026 --version
2. UPGRADE to 18.10.4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade visual-studio-2026
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade visual-studio-2026
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 18.10.0 (Debian / Ubuntu)
apt-cache madison visual-studio-2026
sudo apt install visual-studio-2026=<VERSION_BEFORE_18.10.0>
sudo apt-mark hold visual-studio-2026
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list visual-studio-2026
sudo dnf downgrade visual-studio-2026-<VERSION_BEFORE_18.10.0>
sudo dnf versionlock add visual-studio-2026
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Exact fixes by distribution
Fedora 46 · uv · FIXED · 0.13.5-1.fc46 · FEDORA-2026-61ea5a28c6 · source
sudo dnf upgrade --advisory=FEDORA-2026-61ea5a28c6
Ubuntu 22.04 · dotnet6 · NOT AFFECTED
Ubuntu 22.04 · dotnet8 · NOT AFFECTED
Ubuntu 24.04 · dotnet8 · NOT AFFECTED
Ubuntu 24.04 · dotnet10 · FIXED · 10.0.113-10.0.13-0ubuntu1~24.04.1
sudo apt update && sudo apt install --only-upgrade dotnet10
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' dotnet10)" ge "10.0.113-10.0.13-0ubuntu1~24.04.1" && echo PATCHED || echo STILL-VULNERABLE
RHEL 10 · dotnet10.0 · FIXED · dotnet10.0-10.0.113-1.el10_2
sudo dnf upgrade --advisory=RHSA-2026:86195
rpm -q dotnet10.0
RHEL 8 · dotnet10.0 · FIXED · dotnet10.0-10.0.113-1.el8_10
sudo dnf upgrade --advisory=RHSA-2026:86192
rpm -q dotnet10.0
RHEL 9 · dotnet10.0 · FIXED · dotnet10.0-10.0.113-1.el9_8
sudo dnf upgrade --advisory=RHSA-2026:86193
rpm -q dotnet10.0
Alpine 3.23 · dotnet10-runtime · FIXED · dotnet10-runtime-10.0.13-r0
apk add --upgrade dotnet10-runtime
apk info -v dotnet10-runtime
Alpine 3.24 · dotnet10-runtime · FIXED · dotnet10-runtime-10.0.13-r0
apk add --upgrade dotnet10-runtime
apk info -v dotnet10-runtime
Install KB5130036 via Windows Update, then verify:
Get-HotFix -Id KB5130036
Install KB5130036 via Windows Update, then verify:
Get-HotFix -Id KB5130036
Install KB5130036 via Windows Update, then verify:
Get-HotFix -Id KB5130036
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
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