CVE-2020-1161

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 5.7%, top 8% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application. The vulnerability can be exploited remotely, without authentication. A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core application. The update addresses the vulnerability by correcting how the ASP.NET Core web application handles web requests.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation6% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
92%
KEV
Not listed

Published

May 21, 2020

Last Modified

August 19, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1161
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1161

Vendor Advisories for CVE-2020-1161(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrh-dotnet31-dotnet-0:3.1.104-2.el72020-05-21redhat
redhatdotnet3.1-0:3.1.104-2.el8_22020-05-21redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 1 ecosystem)
NuGet(9)
PackageVulnerable rangeFixed inDependents
Microsoft.AspNetCore.App.Runtime.linux-arm3.1.0, 3.1.1, 3.1.2, 3.1.33.1.4—
Microsoft.AspNetCore.App.Runtime.linux-arm643.1.0, 3.1.1, 3.1.2, 3.1.33.1.4—
Microsoft.AspNetCore.App.Runtime.linux-musl-arm643.1.0, 3.1.1, 3.1.2, 3.1.33.1.4—
Microsoft.AspNetCore.App.Runtime.linux-musl-x643.1.0, 3.1.1, 3.1.2, 3.1.33.1.4—
Microsoft.AspNetCore.App.Runtime.linux-x643.1.0, 3.1.1, 3.1.2, 3.1.33.1.4—
Microsoft.AspNetCore.App.Runtime.osx-x643.1.0, 3.1.1, 3.1.2, 3.1.33.1.4—
Microsoft.AspNetCore.App.Runtime.win-arm3.1.0, 3.1.1, 3.1.2, 3.1.33.1.4—
Microsoft.AspNetCore.App.Runtime.win-x643.1.0, 3.1.1, 3.1.2, 3.1.33.1.4—
Microsoft.AspNetCore.App.Runtime.win-x863.1.0, 3.1.1, 3.1.2, 3.1.33.1.4—

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 127 total refreshes for this CVE.

  1. 2026-08-25 13:45 UTCEPSS rescore
  2. 2026-08-21 23:45 UTCEPSS rescore
  3. 2026-08-20 22:52 UTCEPSS rescore
  4. 2026-08-19 18:09 UTCEG score recompute
  5. 2026-08-19 18:09 UTCVendor advisory
  6. 2026-08-19 17:00 UTCEPSS rescore
  7. 2026-08-18 13:44 UTCEPSS rescore
  8. 2026-08-17 13:43 UTCEPSS rescore
  9. 2026-08-16 14:52 UTCEPSS rescore
  10. 2026-08-16 02:11 UTCEPSS rescore
  11. 2026-08-15 01:26 UTCEPSS rescore
  12. 2026-08-13 21:57 UTCEPSS rescore
  13. 2026-08-12 13:47 UTCEPSS rescore
  14. 2026-08-09 13:43 UTCEPSS rescore
  15. 2026-08-08 16:33 UTCEPSS rescore
  16. 2026-08-07 16:23 UTCEPSS rescore
  17. 2026-08-06 13:43 UTCEPSS rescore
  18. 2026-08-05 19:14 UTCEPSS rescore
  19. 2026-08-05 13:11 UTCOSV refresh
  20. 2026-08-04 15:06 UTCEPSS rescore
  21. 2026-08-04 10:34 UTCEPSS rescore
  22. 2026-08-03 10:32 UTCEPSS rescore
  23. 2026-08-02 02:23 UTCEPSS rescore
  24. 2026-08-01 04:12 UTCEPSS rescore
  25. 2026-07-30 16:25 UTCEPSS rescore
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  1. 2026-07-30 01:27 UTCEPSS rescore
  2. 2026-07-28 15:32 UTCEPSS rescore
  3. 2026-07-27 14:06 UTCEPSS rescore
  4. 2026-07-25 14:15 UTCEPSS rescore
  5. 2026-07-25 14:14 UTCEPSS rescore
  6. 2026-07-24 14:14 UTCEPSS rescore
  7. 2026-07-23 14:15 UTCEPSS rescore
  8. 2026-07-23 14:15 UTCEPSS rescore
  9. 2026-07-23 01:48 UTCEG score recompute
  10. 2026-07-22 22:33 UTCEG score recompute
  11. 2026-07-22 14:05 UTCEPSS rescore
  12. 2026-07-21 15:22 UTCEPSS rescore
  13. 2026-07-21 15:22 UTCEPSS rescore
  14. 2026-07-20 17:04 UTCEPSS rescore
  15. 2026-07-20 17:04 UTCEPSS rescore
  16. 2026-07-19 14:28 UTCEPSS rescore
  17. 2026-07-19 12:00 UTCOSV refresh
  18. 2026-07-19 02:26 UTCEPSS rescore
  19. 2026-07-19 02:26 UTCEPSS rescore
  20. 2026-07-18 10:02 UTCEPSS rescore
  21. 2026-07-16 16:59 UTCEPSS rescore
  22. 2026-07-15 16:55 UTCEPSS rescore
  23. 2026-07-15 01:57 UTCEPSS rescore
  24. 2026-07-13 22:27 UTCEPSS rescore
  25. 2026-07-13 22:27 UTCEPSS rescore
  26. 2026-07-13 06:10 UTCEPSS rescore
  27. 2026-07-13 06:10 UTCEPSS rescore
  28. 2026-07-12 05:44 UTCEPSS rescore
  29. 2026-07-11 08:25 UTCEPSS rescore
  30. 2026-07-11 08:25 UTCEPSS rescore
  31. 2026-07-09 19:07 UTCEPSS rescore
  32. 2026-07-08 15:12 UTCEPSS rescore
  33. 2026-07-07 13:43 UTCEPSS rescore
  34. 2026-07-07 13:43 UTCEPSS rescore
  35. 2026-07-06 16:25 UTCEPSS rescore
  36. 2026-07-06 16:25 UTCEPSS rescore
  37. 2026-07-06 02:21 UTCEPSS rescore
  38. 2026-07-06 02:21 UTCEPSS rescore
  39. 2026-07-05 02:27 UTCEPSS rescore
  40. 2026-07-04 06:29 UTCEPSS rescore
  41. 2026-07-04 06:28 UTCEPSS rescore
  42. 2026-07-01 20:31 UTCOSV refresh
  43. 2026-07-01 15:03 UTCEPSS rescore
  44. 2026-06-30 23:20 UTCEPSS rescore
  45. 2026-06-30 23:20 UTCEPSS rescore
  46. 2026-06-28 14:05 UTCEPSS rescore
  47. 2026-06-28 04:54 UTCEPSS rescore
  48. 2026-06-28 04:54 UTCEPSS rescore
  49. 2026-06-27 03:06 UTCEPSS rescore
  50. 2026-06-25 13:47 UTCEPSS rescore
  51. 2026-06-24 14:03 UTCEPSS rescore
  52. 2026-06-24 14:03 UTCEPSS rescore
  53. 2026-06-23 21:31 UTCEPSS rescore
  54. 2026-06-23 21:31 UTCEPSS rescore
  55. 2026-06-22 14:23 UTCEPSS rescore
  56. 2026-06-22 14:23 UTCEPSS rescore
  57. 2026-06-21 14:54 UTCEPSS rescore
  58. 2026-06-21 14:54 UTCEPSS rescore
  59. 2026-06-21 01:57 UTCEPSS rescore
  60. 2026-06-21 01:57 UTCEPSS rescore
  61. 2026-06-19 19:23 UTCEPSS rescore
  62. 2026-06-18 17:50 UTCEPSS rescore
  63. 2026-06-17 17:50 UTCEPSS rescore
  64. 2026-06-16 17:50 UTCEPSS rescore
  65. 2026-06-16 17:50 UTCEPSS rescore
  66. 2026-06-15 17:46 UTCEPSS rescore
  67. 2026-06-14 02:13 UTCOSV refresh
  68. 2026-06-13 22:58 UTCEPSS rescore
  69. 2026-06-13 22:58 UTCEPSS rescore
  70. 2026-06-12 23:10 UTCEPSS rescore
  71. 2026-06-11 13:58 UTCEPSS rescore
  72. 2026-06-10 22:16 UTCEPSS rescore
  73. 2026-06-10 22:16 UTCEPSS rescore
  74. 2026-06-10 13:20 UTCEPSS rescore
  75. 2026-06-08 14:15 UTCEPSS rescore

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2020-1161?
CVE-2020-1161 is a high vulnerability published on May 21, 2020. A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application. The vulnerability can be exploited remotely, without authentication. A…
When was CVE-2020-1161 disclosed?
CVE-2020-1161 was first published in the National Vulnerability Database on May 21, 2020, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-1161 actively exploited?
CVE-2020-1161 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.2% of all scored CVEs.
What is the CVSS score of CVE-2020-1161?
CVE-2020-1161 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2020-1161?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-1161, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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