CVE-2021-41355 | .NET Core and Visual Studio Information Disclosure Vulnerability

.NET Core and Visual Studio Information Disclosure Vulnerability

Published: 2021-10-13 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-41355 is rated Moderate Risk (54.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.61%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-41355

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 2.71% 3.61% +0.89%
2 2025-11-18 3.61% 2.71% -0.89%
3 2025-08-04 — 3.61% —

Full EPSS history (28 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-41355

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.7 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.1 3.6 [email protected]
5.7 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.1 3.6 [email protected]
2.9 2.0 LOW
AV:A/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 5.5 2.9 [email protected]

Weakness enumeration for CVE-2021-41355

GitHub Security Advisory for CVE-2021-41355

GHSA-9cxh-gqpx-qc5m · Severity: medium · Ecosystem: nuget — Credential Disclosure in System.DirectoryServices.Protocols

OS Trackers for CVE-2021-41355

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2021-41355

Affected software / configurations for CVE-2021-41355

Vendor Product Version Raw CPE
microsoft .net 5.0 cpe:2.3:a:microsoft:.net:5.0:*:*:*:*:*:*:*
microsoft powershell >= 7.1, < 7.1.5 cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:*
microsoft visual_studio_2019 >= 16.0, <= 16.11 cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*

References for CVE-2021-41355

cvelogic Threat Intelligence