CVE-2026-96233: microsoft microsoft .net framework 3.5 Out-of-bounds Write
CVSS: 7.5v3.1HighAwaiting analysis
AliasesGHSA-87vj-4hqv-22p9CGA-3c8m-35jf-fjr5CGA-865f-hr9x-cgcwCGA-grmc-g3gf-fm5pCGA-jq58-44g9-4jjh
Published 13-10-2026Last modified 16-10-2026
Vulnerability summary
CVE-2026-96233 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in microsoft microsoft .net framework 3.5. EPSS estimates a 0.77% chance of exploitation in the next 30 days, higher than 54.7% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
0.77%
0%100%
Low · Change unavailableKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 13-10-2026PublishedVulnerability first disclosed.
- 16-10-2026Last modifiedVulnerability information updated.
Description
Out-of-bounds write in ASP.NET Core allows an unauthorized attacker to deny service over a network.
CVSS metrics
5 scores · 5 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:CSourcesAll 5 agree
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · NugetEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · WolfiEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · ChainguardEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.77%
Chance of exploitation in the next 30 days
Percentile
55%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
14-10-202619-10-2026
EPSS score0.77%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft12 products
- microsoft .net framework 3.5≥ 3.5.0, < 2.0.50727.9188 AND 3.0.30729.9171
- microsoft .net framework 3.5 and 4.6.2/4.7/4.7.1/4.7.2≥ 3.0.0.0, < 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0
- microsoft .net framework 3.5 and 4.7.2≥ 4.7.0, < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0
- microsoft .net framework 3.5 and 4.8≥ 4.8.0, < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0
- microsoft .net framework 3.5 and 4.8.1≥ 4.8.1, < 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
NuGet12 products
- Microsoft.NETCore.App.Runtime.linux-arm≥ 10.0.0, < 10.0.13 | ≥ 11.0.0-preview.1, < 11.0.0-rc.2 | ≥ 9.0.0, < 9.0.21 | ≥ 8.0.0, < 8.0.32
- Microsoft.NETCore.App.Runtime.linux-arm64≥ 10.0.0, < 10.0.13 | ≥ 11.0.0-preview.1, < 11.0.0-rc.2 | ≥ 9.0.0, < 9.0.21 | ≥ 8.0.0, < 8.0.32
- Microsoft.NETCore.App.Runtime.linux-musl-arm≥ 10.0.0, < 10.0.13 | ≥ 11.0.0-preview.1, < 11.0.0-rc.2 | ≥ 9.0.0, < 9.0.21 | ≥ 8.0.0, < 8.0.32
- Microsoft.NETCore.App.Runtime.linux-musl-arm64≥ 10.0.0, < 10.0.13 | ≥ 11.0.0-preview.1, < 11.0.0-rc.2 | ≥ 9.0.0, < 9.0.21 | ≥ 8.0.0, < 8.0.32
- Microsoft.NETCore.App.Runtime.linux-musl-x64≥ 10.0.0, < 10.0.13 | ≥ 11.0.0-preview.1, < 11.0.0-rc.2 | ≥ 9.0.0, < 9.0.21 | ≥ 8.0.0, < 8.0.32
Chainguard2 products
- dotnet-bootstrap-8All versions (No fix recorded)
- dotnet-bootstrap-9All versions (No fix recorded)
Wolfi2 products
- dotnet-bootstrap-8All versions (No fix recorded)
- dotnet-bootstrap-9All versions (No fix recorded)
4 vendors · 28 products
References
5 links
- github.com/dotnet/runtimePACKAGE