7.8

CVE-2026-70354: microsoft microsoft .net framework 3.5 Out-of-bounds Write

CVSS: 7.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-70354GHSA-gg8c-3338-xw2fBIT-dotnet-2026-70354
Published 11-08-2026Last modified 08-10-2026
Open JSON

Vulnerability summary

CVE-2026-70354 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in microsoft microsoft .net framework 3.5. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28.6% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.36%
0%100%
Low · +0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 11-08-2026
    PublishedVulnerability first disclosed.
  2. 08-10-2026
    Last modifiedVulnerability information updated.

Description

Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

+0.07 pp

From 0.29% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.36%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft17 products
NuGet3 products
  • Microsoft.WindowsDesktop.App.Runtime.win-arm64≥ 10.0.0, < 10.0.11 | ≥ 9.0.0, < 9.0.19 | ≥ 8.0.0, < 8.0.30
  • Microsoft.WindowsDesktop.App.Runtime.win-x64≥ 10.0.0, < 10.0.11 | ≥ 9.0.0, < 9.0.19 | ≥ 8.0.0, < 8.0.30
  • Microsoft.WindowsDesktop.App.Runtime.win-x86≥ 10.0.0, < 10.0.11 | ≥ 9.0.0, < 9.0.19 | ≥ 8.0.0, < 8.0.30
Ubuntu1 product
  • dotnet7All versions (No fix recorded)

3 vendors · 21 products

References

8 links