CVE-2026-69651: microsoft microsoft .net framework 3.5 Inefficient Algorithmic Complexity
CVSS: 7.5v3.1HighAwaiting analysis
AliasesGHSA-3rxq-g8rj-r2cfCGA-495c-446v-794qCGA-8h4g-6m73-gmwmCGA-9j74-hmr4-mw6hCGA-chw8-6jqq-x67g
Published 13-10-2026Last modified 16-10-2026
Vulnerability summary
CVE-2026-69651 is a high (CVSS 7.5) Inefficient Algorithmic Complexity vulnerability in microsoft microsoft .net framework 3.5. EPSS estimates a 1.10% chance of exploitation in the next 30 days, higher than 65.2% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
1.10%
0%100%
Low · Change unavailableKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 13-10-2026PublishedVulnerability first disclosed.
- 16-10-2026Last modifiedVulnerability information updated.
Description
Inefficient algorithmic complexity in .NET 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
1.10%
Chance of exploitation in the next 30 days
Percentile
65%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
14-10-202619-10-2026
EPSS score1.10%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft14 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
NuGet11 products
- Microsoft.NETCore.App.Runtime.linux-arm≥ 9.0.0, < 9.0.21 | ≥ 11.0.0-preview.1, < 11.0.0-rc.2 | ≥ 10.0.0, < 10.0.13 | ≥ 8.0.0, < 8.0.32
- Microsoft.NETCore.App.Runtime.linux-arm64≥ 9.0.0, < 9.0.21 | ≥ 11.0.0-preview.1, < 11.0.0-rc.2 | ≥ 10.0.0, < 10.0.13 | ≥ 8.0.0, < 8.0.32
- Microsoft.NETCore.App.Runtime.linux-musl-arm≥ 9.0.0, < 9.0.21 | ≥ 11.0.0-preview.1, < 11.0.0-rc.2 | ≥ 10.0.0, < 10.0.13 | ≥ 8.0.0, < 8.0.32
- Microsoft.NETCore.App.Runtime.linux-musl-arm64≥ 9.0.0, < 9.0.21 | ≥ 11.0.0-preview.1, < 11.0.0-rc.2 | ≥ 10.0.0, < 10.0.13 | ≥ 8.0.0, < 8.0.32
- Microsoft.NETCore.App.Runtime.linux-musl-x64≥ 9.0.0, < 9.0.21 | ≥ 11.0.0-preview.1, < 11.0.0-rc.2 | ≥ 10.0.0, < 10.0.13 | ≥ 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 · 29 products
References
5 links
- github.com/dotnet/runtimePACKAGE