CVE-2025-55247 | .NET Elevation of Privilege Vulnerability

Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.

Published: 2025-10-14 Last update: 2025-10-23 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-55247 is rated Moderate Risk (44.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.56%). 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-2025-55247

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 2026-06-15 0.03% 0.56% +0.53%
2 2025-11-21 0.05% 0.03% -0.02%
3 2025-11-18 — 0.05% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-55247

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.3 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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:L)
A normal user session is enough; they don’t have to be admin.
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:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.3 5.9 [email protected]
7.3 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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:L)
A normal user session is enough; they don’t have to be admin.
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:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.3 5.9 [email protected]

Weakness enumeration for CVE-2025-55247

GitHub Security Advisory for CVE-2025-55247

GHSA-w3q9-fxm7-j8fq · Severity: high · Ecosystem: nuget — Microsoft Security Advisory CVE-2025-55247 | .NET Denial of Service Vulnerability

OS Trackers for CVE-2025-55247

vendor priority summary link
alpine — CVE-2025-55247: 2 source package rows (dotnet8-runtime, dotnet9-runtime); 4 state rows across 2 repos (3.22-community, edge-community); fixed 4, open 0. https://security.alpinelinux.org/vuln/CVE-2025-55247
redhat medium — https://access.redhat.com/security/cve/CVE-2025-55247
ubuntu medium CVE-2025-55247 medium priority: Ubuntu including 5 source packages (dotnet10, dotnet6, dotnet7, dotnet8, dotnet9), 45 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): DNE 29, released 7, needs-triage 6, ignored 2, deferred 1. https://ubuntu.com/security/CVE-2025-55247

Affected software / configurations for CVE-2025-55247

Vendor Product Version Raw CPE
microsoft .net >= 8.0.0, < 8.0.21 cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
microsoft .net >= 9.0.0, < 9.0.10 cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*

References for CVE-2025-55247

cvelogic Threat Intelligence