CVE-2025-26646

HIGHNVD 8.08.0—Trending — 4 sources updated this week

8.0

External control of file name or path in .NET, Visual Studio, and Build Tools for Visual Studio allows an authorized attacker to perform spoofing over a network.

CVSS v3: 8.0
EG Score: 8.0(medium)
EPSS: 27.5%
KEV: Not listed

Published

May 13, 2025

Last Modified

July 10, 2025

References (1)

secure@microsofthttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26646

Vendor Advisories for CVE-2025-26646(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2025-26646
Microsoft Security Response Center (MSRC)High
.NET, Visual Studio, and Build Tools for Visual Studio Spoofing Vulnerability

Patch Availability(10)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	netstandard-targeting-pack-2.1-8.0 (8.0.116-0ubuntu1~24.04.1) @ noble	2026-05-30	ubuntu
redhat	dotnet9-0-main-9.0.116-1.hum1	2026-04-21	redhat
redhat	dotnet8-0-main-8.0.126-1.hum1	2026-04-20	redhat
redhat	dotnet8.0-0:8.0.116-1.el10_0	2025-05-14	redhat
redhat	dotnet9.0-0:9.0.106-1.el8_10	2025-05-14	redhat
redhat	dotnet8.0-0:8.0.116-1.el8_10	2025-05-14	redhat
redhat	dotnet9.0-0:9.0.106-1.el9_6	2025-05-14	redhat
redhat	dotnet8.0-0:8.0.116-1.el9_4	2025-05-14	redhat
redhat	dotnet9.0-0:9.0.106-1.el10_0	2025-05-14	redhat
redhat	dotnet8.0-0:8.0.116-1.el9_6	2025-05-14	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

NuGet(1)

Package	Vulnerable range	Fixed in	Dependents
Microsoft.Build.Tasks.Core	15.8.166, 15.9.20	15.9.30	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-73

Additional Vendor Advisories

(10)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 12× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-30 05:31 UTCEG score recompute
2026-05-30 05:31 UTCVendor advisory
2026-05-30 05:12 UTCOSV refresh
2026-05-29 13:44 UTCepss_batch

Frequently asked(5)

What is CVE-2025-26646?

CVE-2025-26646 is a high vulnerability published on May 13, 2025. External control of file name or path in .NET, Visual Studio, and Build Tools for Visual Studio allows an authorized attacker to perform spoofing over a network.

When was CVE-2025-26646 disclosed?

CVE-2025-26646 was first published in the National Vulnerability Database on May 13, 2025, with the most recent update on July 10, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-26646 actively exploited?

CVE-2025-26646 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 27.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-26646?

CVE-2025-26646 has a CVSS v3 base score of 8.0 (NVD).

How do I remediate CVE-2025-26646?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-26646, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-26646

Explore →

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