6.2

CVE-2026-45491: .NET Tampering Vulnerability

Analyzed
AliasesUBUNTU-CVE-2026-45491CGA-vpxh-6x6h-33qvCGA-wvr4-wqmg-h2vg
Published 09-06-2026Last modified 24-09-2026

Vulnerability summary

CVE-2026-45491 is a medium (CVSS 6.2) vulnerability in microsoft .net. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 32.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.2, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.2/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.39%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 17 · Related 2
RHSA-2026:17527RHSA-2026:25110RHSA-2026:25111RHSA-2026:25112RHSA-2026:25113RHSA-2026:25114

Timeline

  1. 09-06-2026
    PublishedVulnerability first disclosed.
  2. 24-09-2026
    Last modifiedVulnerability information updated.

Description

Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.37% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu5 products
  • dotnet10< 10.0.109-10.0.9-0ubuntu1~24.04.1 | < 10.0.109-10.0.9-0ubuntu1~25.10.1 | < 10.0.109-10.0.9-0ubuntu1 | < 10.0.109-10.0.9-0ubuntu1~26.04.1
  • dotnet6All versions (No fix recorded)
  • dotnet7All versions (No fix recorded)
  • dotnet8< 8.0.128-8.0.28-0ubuntu1~22.04.1 | < 8.0.128-8.0.28-0ubuntu1~24.04.1 | < 8.0.128-8.0.28-0ubuntu1~25.10.1
  • dotnet9< 9.0.118-9.0.17-0ubuntu1~25.10.1
Microsoft4 products
  • .net≥ 8.0.0, < 8.0.28 | ≥ 9.0.0, < 9.0.17 | ≥ 10.0.0, < 10.0.9
  • .net 10.0≥ 10.0.0, < 10.0.9
  • .net 8.0≥ 8.0, < 8.0.28 | ≥ 8.0.0, < 8.0.28
  • .net 9.0≥ 9.0.0, < 9.0.17
Alpine3 products
  • dotnet10-runtime< 10.0.9-r0
  • dotnet8-runtime< 8.0.28-r0
  • dotnet9-runtime< 9.0.17-r0
NuGet3 products
  • Microsoft.NETCore.App.Runtime.linux-x64≥ 8.0.0, < 8.0.28 | ≥ 9.0.0, < 9.0.17 | ≥ 10.0.0, < 10.0.9
  • Microsoft.NETCore.App.Runtime.osx-arm64≥ 8.0.0, < 8.0.28 | ≥ 9.0.0, < 9.0.17 | ≥ 10.0.0, < 10.0.9
  • Microsoft.NETCore.App.Runtime.win-x64≥ 8.0.0, < 8.0.28 | ≥ 9.0.0, < 9.0.17 | ≥ 10.0.0, < 10.0.9
Chainguard2 products
  • dotnet-bootstrap-8< 8.0.129-r0
  • dotnet-bootstrap-9< 9.0.119-r0
Wolfi2 products
  • dotnet-bootstrap-8< 8.0.129-r0
  • dotnet-bootstrap-9< 9.0.119-r0

6 vendors · 19 products

References

10 links