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CVE-2026-70196ImportantDoSNetwork

ASP.NET Core Denial of Service Vulnerability

MSRC advisory NVD CVE.org

Assessment

Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Severity
Important
CVSS base score
5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Impact
Denial of Service
EPSS · 30-day forecast
0.9%FIRST forecast dated 9 Nov 2026, for the following 30 days · FIRST percentile 60.2% · about EPSS
Public detection template
No Nuclei template is listed in the current collected catalog
Exploitation detected
No known exploitation (MSRC assessment)
Exploitability
Exploitation Less Likely
Publicly disclosed
No (MSRC assessment)
Customer action
Required: follow the MSRC remediation guidance
Component
ASP.NET Core
Weakness
CWE-407: Inefficient Algorithmic Complexity
Issued by
Microsoft
Published
13 Oct 2026 · October 2026
Last revised
13 Oct 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
NetworkAV:N
Attack complexity
HighAC:H
Privileges required
NonePR:N
User interaction
NoneUI:N
Scope
UnchangedS:U
Confidentiality
NoneC:N
Integrity
NoneI:N
Availability
HighA:H

Updates that fix it

3 KBs
KBTypeApplies toOther CVEs
KB5130034 Security UpdateASP.NET Core 8.0All CVEs in KB5130034
KB5130035 Security UpdateASP.NET Core 9.0All CVEs in KB5130035
KB5130036 Security UpdateASP.NET Core 10.0All CVEs in KB5130036

Affected products

Developer Tools
5 affected products
  • ASP.NET Core 10.0
  • ASP.NET Core 8.0
  • ASP.NET Core 9.0
  • Microsoft Visual Studio 2022 version 17.14
  • Microsoft Visual Studio 2026 version 18.10

What changed

  1. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  2. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  3. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  4. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  5. Detection template: No Nuclei template listed · Customer action: Required: apply the update → Required: follow the MSRC remediation guidance · Public disclosure: No → No (MSRC assessment) · Exploitation detected: Not reported by MSRC → No known exploitation (MSRC assessment)
  6. Detection template: Unknown: exploit-code evidence is incomplete or retained → No Nuclei template listed · CISA KEV: Unknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  7. Detection template: No Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained · CISA KEV: Not listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (59)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 9 Nov 2026 · 22:24:37 UTC EPSS0.9%; scored 8 Nov 2026 → 0.9%; scored 9 Nov 2026
  2. 8 Nov 2026 · 15:16:05 UTC EPSS0.9%; scored 7 Nov 2026 → 0.9%; scored 8 Nov 2026
  3. 7 Nov 2026 · 16:12:44 UTC EPSS0.9%; scored 6 Nov 2026 → 0.9%; scored 7 Nov 2026
  4. 6 Nov 2026 · 19:15:37 UTC EPSS0.9%; scored 5 Nov 2026 → 0.9%; scored 6 Nov 2026
  5. 6 Nov 2026 · 17:32:22 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  6. 6 Nov 2026 · 17:32:22 UTC Source coverage: public-exploit-codeIncomplete → Current
  7. 6 Nov 2026 · 17:32:22 UTC Source coverage: first-epssIncomplete → Current
  8. 6 Nov 2026 · 17:32:22 UTC Source coverage: msrc-cvrfIncomplete → Current
  9. 6 Nov 2026 · 16:31:02 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  10. 6 Nov 2026 · 16:31:02 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  11. 6 Nov 2026 · 16:31:02 UTC Source coverage: first-epssCurrent → Incomplete
  12. 6 Nov 2026 · 16:31:02 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  13. 5 Nov 2026 · 23:42:03 UTC EPSS0.9%; scored 4 Nov 2026 → 0.9%; scored 5 Nov 2026
  14. 5 Nov 2026 · 02:36:20 UTC EPSS0.9%; scored 3 Nov 2026 → 0.9%; scored 4 Nov 2026
  15. 4 Nov 2026 · 03:04:37 UTC EPSS0.9%; scored 2 Nov 2026 → 0.9%; scored 3 Nov 2026
  16. 3 Nov 2026 · 01:53:36 UTC EPSS0.9%; scored 1 Nov 2026 → 0.9%; scored 2 Nov 2026
  17. 2 Nov 2026 · 17:30:39 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  18. 2 Nov 2026 · 17:30:39 UTC Source coverage: public-exploit-codeIncomplete → Current
  19. 2 Nov 2026 · 17:30:39 UTC Source coverage: first-epssIncomplete → Current
  20. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  21. 2 Nov 2026 · 16:27:39 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  22. 2 Nov 2026 · 16:27:39 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  23. 2 Nov 2026 · 16:27:39 UTC Source coverage: first-epssCurrent → Incomplete
  24. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  25. 2 Nov 2026 · 00:36:51 UTC EPSS0.9%; scored 31 Oct 2026 → 0.9%; scored 1 Nov 2026
  26. 31 Oct 2026 · 18:22:15 UTC EPSS0.9%; scored 30 Oct 2026 → 0.9%; scored 31 Oct 2026
  27. 30 Oct 2026 · 18:02:45 UTC EPSS0.9%; scored 29 Oct 2026 → 0.9%; scored 30 Oct 2026
  28. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  29. 29 Oct 2026 · 20:19:26 UTC Customer actionRequired: apply the update → Required: follow the MSRC remediation guidance
  30. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → No (MSRC assessment)
  31. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → No known exploitation (MSRC assessment)
  32. 29 Oct 2026 · 18:33:30 UTC EPSS0.9%; scored 28 Oct 2026 → 0.9%; scored 29 Oct 2026
  33. 28 Oct 2026 · 20:00:33 UTC EPSS0.9%; scored 27 Oct 2026 → 0.9%; scored 28 Oct 2026
  34. 27 Oct 2026 · 15:48:13 UTC EPSS0.9%; scored 26 Oct 2026 → 0.9%; scored 27 Oct 2026
  35. 26 Oct 2026 · 23:57:09 UTC EPSS0.9%; scored 25 Oct 2026 → 0.9%; scored 26 Oct 2026
  36. 25 Oct 2026 · 17:12:51 UTC EPSS0.8%; scored 24 Oct 2026 → 0.9%; scored 25 Oct 2026
  37. 25 Oct 2026 · 01:34:18 UTC EPSS0.8%; scored 23 Oct 2026 → 0.8%; scored 24 Oct 2026
  38. 23 Oct 2026 · 15:51:28 UTC EPSS0.8%; scored 22 Oct 2026 → 0.8%; scored 23 Oct 2026
  39. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  40. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  41. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  42. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  43. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  44. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  45. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  46. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  47. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  48. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  49. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  50. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  51. 22 Oct 2026 · 17:33:15 UTC EPSS0.8%; scored 21 Oct 2026 → 0.8%; scored 22 Oct 2026
  52. 21 Oct 2026 · 21:47:24 UTC EPSS0.8%; scored 20 Oct 2026 → 0.8%; scored 21 Oct 2026
  53. 20 Oct 2026 · 20:53:31 UTC EPSS0.8%; scored 19 Oct 2026 → 0.8%; scored 20 Oct 2026
  54. 19 Oct 2026 · 15:12:40 UTC EPSS0.8%; scored 18 Oct 2026 → 0.8%; scored 19 Oct 2026
  55. 18 Oct 2026 · 14:54:30 UTC EPSS0.8%; scored 16 Oct 2026 → 0.8%; scored 18 Oct 2026
  56. 18 Oct 2026 · 14:54:30 UTC Link: October 2026/security?release=2026-Oct#cves
  57. 16 Oct 2026 · 16:13:25 UTC EPSS0.8%; scored 15 Oct 2026 → 0.8%; scored 16 Oct 2026
  58. 15 Oct 2026 · 21:30:54 UTC EPSS0.8%; scored 14 Oct 2026 → 0.8%; scored 15 Oct 2026
  59. 15 Oct 2026 · 01:07:54 UTC EPSSNot scored → 0.8%; scored 14 Oct 2026

Explore global source statements, affected packages and advisory history for CVE-2026-70196. The catalog has a separate collection scope from Microsoft release records.

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

CVE-2026-70196

No KEV entry is attached to this observation; this is not evidence that exploitation is absent.

FIRST EPSS: 0.91 % · percentile 60.23 % · scored 9 Nov 2026.

Observed 09 Nov 2026 21:04:24 UTC · Complete immutable risk JSON

Dated risk observations

Risk history is separate from CNA/OSV content history. Daily score drift is retained but only an upward crossing of 10% triggers the prediction change event.

CVE-2026-70196 · 09 Nov 2026 21:04:24 UTC

CVE-2026-70196 · 08 Nov 2026 15:12:21 UTC

CVE-2026-70196 · 07 Nov 2026 16:07:52 UTC

CVE-2026-70196 · 06 Nov 2026 19:10:17 UTC

CVE-2026-70196 · 05 Nov 2026 22:49:22 UTC

CVE-2026-70196 · 05 Nov 2026 02:54:06 UTC

CVE-2026-70196 · 03 Nov 2026 16:59:18 UTC

CVE-2026-70196 · 02 Nov 2026 23:59:04 UTC

CVE-2026-70196 · 01 Nov 2026 23:58:58 UTC

CVE-2026-70196 · 01 Nov 2026 03:04:52 UTC

CVE-2026-70196 · 31 Oct 2026 01:52:30 UTC

CVE-2026-70196 · 29 Oct 2026 18:29:26 UTC

CVE-2026-70196 · 28 Oct 2026 19:55:37 UTC

CVE-2026-70196 · 27 Oct 2026 15:46:19 UTC

CVE-2026-70196 · 27 Oct 2026 00:23:05 UTC

CVE-2026-70196 · 25 Oct 2026 15:18:41 UTC

CVE-2026-70196 · 25 Oct 2026 02:24:38 UTC

CVE-2026-70196 · 23 Oct 2026 16:01:26 UTC

Immutable source observations

23 recorded revisions

Each citation identifies one complete source statement. Source modification dates and the time this installation observed them are distinct. Latest history includes records historically associated by source identifiers; a removed alias is not a current equivalence claim. Exact citations show that source record's own earlier observations. Failed reads and unchanged polls do not rewrite history.

9 Nov 2026 15:06:07 UTC

Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.

euvd · EUVD-2026-99695 · Published

7 Nov 2026 14:22:12 UTC

Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.

euvd · EUVD-2026-99695 · Published

5 Nov 2026 13:38:07 UTC

Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.

euvd · EUVD-2026-99695 · Published

3 Nov 2026 13:01:09 UTC

Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.

euvd · EUVD-2026-99695 · Published

1 Nov 2026 11:57:59 UTC

Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.

euvd · EUVD-2026-99695 · Published

30 Oct 2026 11:49:47 UTC

Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.

euvd · EUVD-2026-99695 · Published

28 Oct 2026 08:47:18 UTC

Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.

euvd · EUVD-2026-99695 · Published

25 Oct 2026 15:18:57 UTC

Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.

nvd · CVE-2026-70196 · Published

23 Oct 2026 16:01:25 UTC

Microsoft Security Advisory CVE-2026-70196 - ASP.NET Core Denial of Service Vulnerability

osv · GHSA-57xr-hfxx-jw5x · Published

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 10 Nov 05:46 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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