01 Record
CVE-2026-26171
.NET Denial of Service Vulnerability
HighPUBLISHEDCNA: microsoft
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
02 Description
.NET Denial of Service Vulnerability
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 1.75% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 77.7% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-10-26.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-04-14 16:58Z6 MO AGO
- Last updated
- 2026-10-15 15:53Z14 DAYS AGO
- Reserved
- 2026-02-11
- Assigning CNA
- microsoft
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
- Weaknesses
- Data version
- 5.2
- Document digest
- b19393d2a57aab46985d56aa9ada05eed36e2de47e85755c59b684d44e9823dc
05 Affected products
VendorProductVersionsPlatforms
06 References
- msrc.microsoft.com.NET Denial of Service Vulnerabilityhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26171
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-26171
- bugzilla.redhat.comRHBZ#2457739https://bugzilla.redhat.com/show_bug.cgi?id=2457739
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26171.json
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:13281
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:13280
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:8467
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:8470
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:8472
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:8473
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:8468
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:8475
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:13693
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:13283
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:13282
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:8471
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:8469
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:8474
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:9077
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:9080
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:9205
07 Fixed in
AlmaLinux 8
- aspnetcore-runtime-10.0 Fixed in 10.0.6-1.el8_10
- aspnetcore-runtime-8.0 Fixed in 8.0.26-1.el8_10
- aspnetcore-runtime-9.0 Fixed in 9.0.15-1.el8_10
- aspnetcore-runtime-dbg-10.0 Fixed in 10.0.6-1.el8_10
- aspnetcore-runtime-dbg-8.0 Fixed in 8.0.26-1.el8_10
- aspnetcore-runtime-dbg-9.0 Fixed in 9.0.15-1.el8_10
- aspnetcore-targeting-pack-10.0 Fixed in 10.0.6-1.el8_10
- aspnetcore-targeting-pack-8.0 Fixed in 8.0.26-1.el8_10
- aspnetcore-targeting-pack-9.0 Fixed in 9.0.15-1.el8_10
- dotnet Fixed in 10.0.106-1.el8_10
- dotnet-apphost-pack-10.0 Fixed in 10.0.6-1.el8_10
- dotnet-apphost-pack-8.0 Fixed in 8.0.26-1.el8_10
- dotnet-apphost-pack-9.0 Fixed in 9.0.15-1.el8_10
- dotnet-host Fixed in 10.0.6-1.el8_10
- dotnet-hostfxr-10.0 Fixed in 10.0.6-1.el8_10
- dotnet-hostfxr-8.0 Fixed in 8.0.26-1.el8_10
- dotnet-hostfxr-9.0 Fixed in 9.0.15-1.el8_10
- dotnet-runtime-10.0 Fixed in 10.0.6-1.el8_10
- dotnet-runtime-8.0 Fixed in 8.0.26-1.el8_10
- dotnet-runtime-9.0 Fixed in 9.0.15-1.el8_10
- dotnet-runtime-dbg-10.0 Fixed in 10.0.6-1.el8_10
- dotnet-runtime-dbg-8.0 Fixed in 8.0.26-1.el8_10
- dotnet-runtime-dbg-9.0 Fixed in 9.0.15-1.el8_10
- dotnet-sdk-10.0 Fixed in 10.0.106-1.el8_10
- dotnet-sdk-10.0-source-built-artifacts Fixed in 10.0.106-1.el8_10
- dotnet-sdk-8.0 Fixed in 8.0.126-1.el8_10
- dotnet-sdk-8.0-source-built-artifacts Fixed in 8.0.126-1.el8_10
- dotnet-sdk-9.0 Fixed in 9.0.116-1.el8_10
- dotnet-sdk-9.0-source-built-artifacts Fixed in 9.0.116-1.el8_10
- dotnet-sdk-aot-10.0 Fixed in 10.0.106-1.el8_10
- dotnet-sdk-aot-9.0 Fixed in 9.0.116-1.el8_10
- dotnet-sdk-dbg-10.0 Fixed in 10.0.106-1.el8_10
- dotnet-sdk-dbg-8.0 Fixed in 8.0.126-1.el8_10
- dotnet-sdk-dbg-9.0 Fixed in 9.0.116-1.el8_10
- dotnet-targeting-pack-10.0 Fixed in 10.0.6-1.el8_10
- dotnet-targeting-pack-8.0 Fixed in 8.0.26-1.el8_10
- dotnet-targeting-pack-9.0 Fixed in 9.0.15-1.el8_10
- dotnet-templates-10.0 Fixed in 10.0.106-1.el8_10
- dotnet-templates-8.0 Fixed in 8.0.126-1.el8_10
- dotnet-templates-9.0 Fixed in 9.0.116-1.el8_10
1 further packages in AlmaLinux 8 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- aspnetcore-runtime-8.0 Fixed in 8.0.26-1.el9_7
- aspnetcore-runtime-dbg-8.0 Fixed in 8.0.26-1.el9_7
- aspnetcore-targeting-pack-8.0 Fixed in 8.0.26-1.el9_7
- dotnet-apphost-pack-8.0 Fixed in 8.0.26-1.el9_7
- dotnet-hostfxr-8.0 Fixed in 8.0.26-1.el9_7
- dotnet-runtime-8.0 Fixed in 8.0.26-1.el9_7
- dotnet-runtime-dbg-8.0 Fixed in 8.0.26-1.el9_7
- dotnet-sdk-8.0 Fixed in 8.0.126-1.el9_7
- dotnet-sdk-8.0-source-built-artifacts Fixed in 8.0.126-1.el9_7
- dotnet-sdk-dbg-8.0 Fixed in 8.0.126-1.el9_7
- dotnet-targeting-pack-8.0 Fixed in 8.0.26-1.el9_7
- dotnet-templates-8.0 Fixed in 8.0.126-1.el9_7
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 10
- aspnetcore-runtime-8.0 Fixed in 8.0.26-1.el10_1
- aspnetcore-runtime-9.0 Fixed in 9.0.15-1.el10_1
- aspnetcore-runtime-dbg-8.0 Fixed in 8.0.26-1.el10_1
- aspnetcore-runtime-dbg-9.0 Fixed in 9.0.15-1.el10_1
- aspnetcore-targeting-pack-8.0 Fixed in 8.0.26-1.el10_1
- aspnetcore-targeting-pack-9.0 Fixed in 9.0.15-1.el10_1
- dotnet-apphost-pack-8.0 Fixed in 8.0.26-1.el10_1
- dotnet-apphost-pack-9.0 Fixed in 9.0.15-1.el10_1
- dotnet-hostfxr-8.0 Fixed in 8.0.26-1.el10_1
- dotnet-hostfxr-9.0 Fixed in 9.0.15-1.el10_1
- dotnet-runtime-8.0 Fixed in 8.0.26-1.el10_1
- dotnet-runtime-9.0 Fixed in 9.0.15-1.el10_1
- dotnet-runtime-dbg-8.0 Fixed in 8.0.26-1.el10_1
- dotnet-runtime-dbg-9.0 Fixed in 9.0.15-1.el10_1
- dotnet-sdk-8.0 Fixed in 8.0.126-1.el10_1
- dotnet-sdk-8.0-source-built-artifacts Fixed in 8.0.126-1.el10_1
- dotnet-sdk-9.0 Fixed in 9.0.116-1.el10_1
- dotnet-sdk-9.0-source-built-artifacts Fixed in 9.0.116-1.el10_1
- dotnet-sdk-aot-9.0 Fixed in 9.0.116-1.el10_1
- dotnet-sdk-dbg-8.0 Fixed in 8.0.126-1.el10_1
- dotnet-sdk-dbg-9.0 Fixed in 9.0.116-1.el10_1
- dotnet-targeting-pack-8.0 Fixed in 8.0.26-1.el10_1
- dotnet-targeting-pack-9.0 Fixed in 9.0.15-1.el10_1
- dotnet-templates-8.0 Fixed in 8.0.126-1.el10_1
- dotnet-templates-9.0 Fixed in 9.0.116-1.el10_1
- netstandard-targeting-pack-2.1 Fixed in 9.0.116-1.el10_1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- aspnetcore-runtime-10.0 Fixed in 10.0.6-1.el8_10
- aspnetcore-runtime-8.0 Fixed in 8.0.26-1.el8_10
- aspnetcore-runtime-9.0 Fixed in 9.0.15-1.el8_10
- aspnetcore-runtime-dbg-10.0 Fixed in 10.0.6-1.el8_10
- aspnetcore-runtime-dbg-8.0 Fixed in 8.0.26-1.el8_10
- aspnetcore-runtime-dbg-9.0 Fixed in 9.0.15-1.el8_10
- aspnetcore-targeting-pack-10.0 Fixed in 10.0.6-1.el8_10
- aspnetcore-targeting-pack-8.0 Fixed in 8.0.26-1.el8_10
- aspnetcore-targeting-pack-9.0 Fixed in 9.0.15-1.el8_10
- dotnet Fixed in 10.0.106-1.el8_10
- dotnet-apphost-pack-10.0 Fixed in 10.0.6-1.el8_10
- dotnet-apphost-pack-8.0 Fixed in 8.0.26-1.el8_10
- dotnet-apphost-pack-9.0 Fixed in 9.0.15-1.el8_10
- dotnet-host Fixed in 10.0.6-1.el8_10
- dotnet-hostfxr-10.0 Fixed in 10.0.6-1.el8_10
- dotnet-hostfxr-8.0 Fixed in 8.0.26-1.el8_10
- dotnet-hostfxr-9.0 Fixed in 9.0.15-1.el8_10
- dotnet-runtime-10.0 Fixed in 10.0.6-1.el8_10
- dotnet-runtime-8.0 Fixed in 8.0.26-1.el8_10
- dotnet-runtime-9.0 Fixed in 9.0.15-1.el8_10
- dotnet-runtime-dbg-10.0 Fixed in 10.0.6-1.el8_10
- dotnet-runtime-dbg-8.0 Fixed in 8.0.26-1.el8_10
- dotnet-runtime-dbg-9.0 Fixed in 9.0.15-1.el8_10
- dotnet-sdk-10.0 Fixed in 10.0.106-1.el8_10
- dotnet-sdk-10.0-source-built-artifacts Fixed in 10.0.106-1.el8_10
- dotnet-sdk-8.0 Fixed in 8.0.126-1.el8_10
- dotnet-sdk-8.0-source-built-artifacts Fixed in 8.0.126-1.el8_10
- dotnet-sdk-9.0 Fixed in 9.0.116-1.el8_10
- dotnet-sdk-9.0-source-built-artifacts Fixed in 9.0.116-1.el8_10
- dotnet-sdk-aot-10.0 Fixed in 10.0.106-1.el8_10
- dotnet-sdk-aot-9.0 Fixed in 9.0.116-1.el8_10
- dotnet-sdk-dbg-10.0 Fixed in 10.0.106-1.el8_10
- dotnet-sdk-dbg-8.0 Fixed in 8.0.126-1.el8_10
- dotnet-sdk-dbg-9.0 Fixed in 9.0.116-1.el8_10
- dotnet-targeting-pack-10.0 Fixed in 10.0.6-1.el8_10
- dotnet-targeting-pack-8.0 Fixed in 8.0.26-1.el8_10
- dotnet-targeting-pack-9.0 Fixed in 9.0.15-1.el8_10
- dotnet-templates-10.0 Fixed in 10.0.106-1.el8_10
- dotnet-templates-8.0 Fixed in 8.0.126-1.el8_10
- dotnet-templates-9.0 Fixed in 9.0.116-1.el8_10
1 further packages in CloudLinux 8 not shown (first 40 listed).
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- aspnetcore-runtime-8.0 Fixed in 8.0.26-1.el9_7
- aspnetcore-runtime-dbg-8.0 Fixed in 8.0.26-1.el9_7
- aspnetcore-targeting-pack-8.0 Fixed in 8.0.26-1.el9_7
- dotnet-apphost-pack-8.0 Fixed in 8.0.26-1.el9_7
- dotnet-hostfxr-8.0 Fixed in 8.0.26-1.el9_7
- dotnet-runtime-8.0 Fixed in 8.0.26-1.el9_7
- dotnet-runtime-dbg-8.0 Fixed in 8.0.26-1.el9_7
- dotnet-sdk-8.0 Fixed in 8.0.126-1.el9_7
- dotnet-sdk-8.0-source-built-artifacts Fixed in 8.0.126-1.el9_7
- dotnet-sdk-dbg-8.0 Fixed in 8.0.126-1.el9_7
- dotnet-targeting-pack-8.0 Fixed in 8.0.26-1.el9_7
- dotnet-templates-8.0 Fixed in 8.0.126-1.el9_7
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 10
- aspnetcore-runtime-8.0 Fixed in 8.0.26-1.el10_1
- aspnetcore-runtime-9.0 Fixed in 9.0.15-1.el10_1
- aspnetcore-runtime-dbg-8.0 Fixed in 8.0.26-1.el10_1
- aspnetcore-runtime-dbg-9.0 Fixed in 9.0.15-1.el10_1
- aspnetcore-targeting-pack-8.0 Fixed in 8.0.26-1.el10_1
- aspnetcore-targeting-pack-9.0 Fixed in 9.0.15-1.el10_1
- dotnet-apphost-pack-8.0 Fixed in 8.0.26-1.el10_1
- dotnet-apphost-pack-9.0 Fixed in 9.0.15-1.el10_1
- dotnet-hostfxr-8.0 Fixed in 8.0.26-1.el10_1
- dotnet-hostfxr-9.0 Fixed in 9.0.15-1.el10_1
- dotnet-runtime-8.0 Fixed in 8.0.26-1.el10_1
- dotnet-runtime-9.0 Fixed in 9.0.15-1.el10_1
- dotnet-runtime-dbg-8.0 Fixed in 8.0.26-1.el10_1
- dotnet-runtime-dbg-9.0 Fixed in 9.0.15-1.el10_1
- dotnet-sdk-8.0 Fixed in 8.0.126-1.el10_1
- dotnet-sdk-8.0-source-built-artifacts Fixed in 8.0.126-1.el10_1
- dotnet-sdk-9.0 Fixed in 9.0.116-1.el10_1
- dotnet-sdk-9.0-source-built-artifacts Fixed in 9.0.116-1.el10_1
- dotnet-sdk-aot-9.0 Fixed in 9.0.116-1.el10_1
- dotnet-sdk-dbg-8.0 Fixed in 8.0.126-1.el10_1
- dotnet-sdk-dbg-9.0 Fixed in 9.0.116-1.el10_1
- dotnet-targeting-pack-8.0 Fixed in 8.0.26-1.el10_1
- dotnet-targeting-pack-9.0 Fixed in 9.0.15-1.el10_1
- dotnet-templates-8.0 Fixed in 8.0.126-1.el10_1
- dotnet-templates-9.0 Fixed in 9.0.116-1.el10_1
- netstandard-targeting-pack-2.1 Fixed in 9.0.116-1.el10_1
Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- dotnet6 No fix yet
- dotnet7 No fix yet
- dotnet8 Fixed in 8.0.126-8.0.26-0ubuntu1~22.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- dotnet10 Fixed in 10.0.106-10.0.6-0ubuntu1~24.04.1
- dotnet8 Fixed in 8.0.126-8.0.26-0ubuntu1~24.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- dotnet10 Fixed in 10.0.106-10.0.6-0ubuntu1~25.10.1
- dotnet8 Fixed in 8.0.126-8.0.26-0ubuntu1~25.10.1
- dotnet9 Fixed in 9.0.116-9.0.15-0ubuntu1~25.10.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- dotnet10 Fixed in 10.0.107-10.0.7-0ubuntu1~26.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- dotnet10 Fixed in 10.0.107-10.0.7-0ubuntu1~26.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.