Vulnerability · Published Feb 25, 2021 · Assigned by microsoft
CVE-2021-26701.NET Core Remote Code Execution Vulnerability
High 8.1
In plain English
A high-severity security flaw in Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 30.1% (higher than 98% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)30.1%top 1.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
.NET Core Remote Code Execution Vulnerability
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | system.text.encodings.web | 4.5.1 | GHSA-ghhp-997w-qr28 |
| NuGet | system.text.encodings.web | 4.7.2 | GHSA-ghhp-997w-qr28 |
| NuGet | system.text.encodings.web | 5.0.1 | GHSA-ghhp-997w-qr28 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET Core 2.1 | 2.1 – before publication |
| Microsoft | .NET Core 3.1 | 3.1 – before publication |
| Microsoft | .NET 5.0 | 5.0.0 – before publication |
| Microsoft | Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3) | 16.0 – before publication |
| Microsoft | Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) | 15.9.0 – before publication |
| Microsoft | Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6) | 16.0.0 – before publication |
| Microsoft | Visual Studio 2019 for Mac | 8.0.0 – before publication |
| Microsoft | Microsoft Visual Studio 2019 version 16.8 (includes 16.0 - 16.7) | 16.0 – before publication |
| Microsoft | Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8) | 15.0.0 – before publication |
| Microsoft | PowerShell Core 7.1 | 7.1.0 – before publication |
| Microsoft | PowerShell Core 7.0 | 7.0.0 – before publication |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701 x_refsource_MISC
- FEDORA-2021-e2d218afe6 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-904d0bd496 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-1b22f31541 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-138728e59b vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-3da33cdc80 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-265a3c7cb9 vendor-advisory, x_refsource_FEDORA