🛡️ CVE-2025-55247 on NuGet (Root.io) — microsoft.build.tasks.core

Distribution advisory

This page covers CVE-2025-55247 as tracked by NuGet (Root.io), for the package microsoft.build.tasks.core. The fix is available in version 17.11.31.416103; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

• Attack vector: Local — a local account, shell or session on the host is needed.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: Low — an ordinary user account is enough.
• User interaction: Required — someone has to click, open or visit something.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

ROOT-APP-NUGET-CVE-2025-55247 is classified as CWE-59: Link Following. The software follows symbolic or hard links without verifying their target, so a planted link can redirect an operation to a sensitive file.

Affected software

ROOT-APP-NUGET-CVE-2025-55247 is recorded against 4 packages.

• microsoft.build.tasks.core (fixed in 17.11.31.416103)
• microsoft.build.utilities.core (fixed in 17.11.31.416103)
• rootio.microsoft.build.tasks.core (fixed in 17.11.31.120073)
• rootio.microsoft.build.utilities.core (fixed in 17.11.31.120073)

Timeline and source

Published on 17 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

Other advisories for this package

microsoft.build.tasks.core has other advisories on record. If you are patching this one, these are worth checking on the same host:

• ROOT-APP-NUGET-CVE-2025-26646 (8.0 High, published 17 Aug 2026)
• ECHO-8c58-e4fe-da70 (published 24 Nov 2025)
• CVE-2025-55247 (8.0 High, published 15 Oct 2025)
• GHSA-q8g5-rw97-f55h (8.0 High, published 14 Oct 2025)
• CVE-2025-26646 (8.0 High, published 13 May 2025)

Same weakness in other software

These advisories are the same class of weakness (CWE-59: Link Following) in other software:

• CVE-2026-71556 (8.0 High, published 18 Aug 2026)
• CVE-2026-70622 (6.5 Medium, published 10 Aug 2026)
• CVE-2026-71964 (6.5 Medium, published 10 Aug 2026)

CVE-2025-55247 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Affected Packages

References