CVE-2026-70197
validatedZero produced an exploit or a check.GHSA-4mpw-cpwj-hxxj ↗EUVD-2026-99701 ↗
check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
nuget:Microsoft.NETCore.App.Runtime.win-arm64 >= 8.0.0, <= 8.0.31; >= 11.0.0-preview.1, <= 11.0.0-rc.1; >= 9.0.0, <= 9.0.20; >= 10.0.0, <= 10.0.12
fixed in 8.0.32, 11.0.0-rc.2, 9.0.21, 10.0.13
ETK-2026-1517Zero's internal tracking ID, independent of the CVE number., permanent identifier
pkg:nuget/Microsoft.NETCore.App.Runtime.win-arm64
pkg:nuget/Microsoft.NETCore.App.Runtime.win-x64
pkg:nuget/Microsoft.NETCore.App.Runtime.win-x86
+4h52mTTV
8mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable description
Affected Windows .NET runtime packages contain a bounds-write flaw in System.Net.Sockets. An unauthenticated network attacker may be able to execute code when an application reuses SocketAsyncEventArgs across IPv4 and IPv6 datagram sockets during ReceiveFromAsync.
mitigation
Update affected Windows runtime package references to 8.0.32, 9.0.21, 10.0.13, or 11.0.0-rc.2, as applicable, and restart applications. Rebuild and redeploy self-contained applications with an updated runtime.
fixed in 8.0.32, 11.0.0-rc.2, 9.0.21, 10.0.13
check
available
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
contextual
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
0.70%52nd percentile
agent run time
8m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-13 19:00Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–
outcome
Contextual check: a technique exists and was validated, but no deterministic check could cover this one.
source signals
Public signals that triggered or updated the pipeline. These are inputs for the deltas above.
- 2026-10-13 19:00Zghsa: trigger signal, started the run
- 2026-10-13 19:00Zcve.org record for CVE-2026-70197
this entry in the feed
GET /api/v1/feed/CVE-2026-70197
{ "etk_id": "ETK-2026-1517", "cve_id": "CVE-2026-70197", "display_id": "CVE-2026-70197", "ghsa_id": "GHSA-4mpw-cpwj-hxxj", "euvd_id": "EUVD-2026-99701", "status": "published", "anchor_state": "anchored", "title": "System.Net.Sockets out-of-bounds write on Windows", "summary": "Affected Windows .NET runtime packages contain a bounds-write flaw in System.Net.Sockets. An unauthenticated network attacker may be able to execute code when an application reuses SocketAsyncEventArgs across IPv4 and IPv6 datagram sockets during ReceiveFromAsync.", "mitigation": "Update affected Windows runtime package references to 8.0.32, 9.0.21, 10.0.13, or 11.0.0-rc.2, as applicable, and restart applications. Rebuild and redeploy self-contained applications with an updated runtime.", "vendor": "nuget", "product": "nuget:Microsoft.NETCore.App.Runtime.win-arm64", "affected": [ { "affected_notes": [], "affected_ranges": [ ">= 8.0.0, <= 8.0.31" ], "ecosystem": "nuget", "fixed_versions": [ "8.0.32" ], "package_name": "Microsoft.NETCore.App.Runtime.win-arm64", "purl": "pkg:nuget/Microsoft.NETCore.App.Runtime.win-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 8.0.0, <= 8.0.31" ], "ecosystem": "nuget", "fixed_versions": [ "8.0.32" ], "package_name": "Microsoft.NETCore.App.Runtime.win-x64", "purl": "pkg:nuget/Microsoft.NETCore.App.Runtime.win-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 8.0.0, <= 8.0.31" ], "ecosystem": "nuget", "fixed_versions": [ "8.0.32" ], "package_name": "Microsoft.NETCore.App.Runtime.win-x86", "purl": "pkg:nuget/Microsoft.NETCore.App.Runtime.win-x86" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.NETCore.App.Runtime.win-arm64", "purl": "pkg:nuget/Microsoft.NETCore.App.Runtime.win-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.NETCore.App.Runtime.win-x64", "purl": "pkg:nuget/Microsoft.NETCore.App.Runtime.win-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 11.0.0-preview.1, <= 11.0.0-rc.1" ], "ecosystem": "nuget", "fixed_versions": [ "11.0.0-rc.2" ], "package_name": "Microsoft.NETCore.App.Runtime.win-x86", "purl": "pkg:nuget/Microsoft.NETCore.App.Runtime.win-x86" }, { "affected_notes": [], "affected_ranges": [ ">= 9.0.0, <= 9.0.20" ], "ecosystem": "nuget", "fixed_versions": [ "9.0.21" ], "package_name": "Microsoft.NETCore.App.Runtime.win-arm64", "purl": "pkg:nuget/Microsoft.NETCore.App.Runtime.win-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 9.0.0, <= 9.0.20" ], "ecosystem": "nuget", "fixed_versions": [ "9.0.21" ], "package_name": "Microsoft.NETCore.App.Runtime.win-x64", "purl": "pkg:nuget/Microsoft.NETCore.App.Runtime.win-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 9.0.0, <= 9.0.20" ], "ecosystem": "nuget", "fixed_versions": [ "9.0.21" ], "package_name": "Microsoft.NETCore.App.Runtime.win-x86", "purl": "pkg:nuget/Microsoft.NETCore.App.Runtime.win-x86" }, { "affected_notes": [], "affected_ranges": [ ">= 10.0.0, <= 10.0.12" ], "ecosystem": "nuget", "fixed_versions": [ "10.0.13" ], "package_name": "Microsoft.NETCore.App.Runtime.win-arm64", "purl": "pkg:nuget/Microsoft.NETCore.App.Runtime.win-arm64" }, { "affected_notes": [], "affected_ranges": [ ">= 10.0.0, <= 10.0.12" ], "ecosystem": "nuget", "fixed_versions": [ "10.0.13" ], "package_name": "Microsoft.NETCore.App.Runtime.win-x64", "purl": "pkg:nuget/Microsoft.NETCore.App.Runtime.win-x64" }, { "affected_notes": [], "affected_ranges": [ ">= 10.0.0, <= 10.0.12" ], "ecosystem": "nuget", "fixed_versions": [ "10.0.13" ], "package_name": "Microsoft.NETCore.App.Runtime.win-x86", "purl": "pkg:nuget/Microsoft.NETCore.App.Runtime.win-x86" } ], "cwes": null, "cvss_score": 8.1, "cvss_src": "cna_vendor", "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "epss_score": 0.007, "epss_percentile": 0.5216, "epss_asof": "2026-10-20", "automation": "contextual", "check": true, "check_confidence_basis": "assessed", "exploit": false, "pipeline_minutes": 7.8516805666666665, "t0_at": "2026-10-13T19:00:26.869000+00:00", "signals": { "check": { "at": "2026-10-13T23:52:52.557242+00:00", "days": 0.2030750953935185, "is_lower_bound": false, "measured_at": "2026-10-13T19:00:26.869000+00:00", "url": null }, "trigger_signal": { "at": "2026-10-13T19:00:26.869000+00:00", "days": 0, "is_lower_bound": false, "measured_at": "2026-10-13T19:00:26.869000+00:00", "url": "https://github.com/advisories/GHSA-4mpw-cpwj-hxxj" } } }
published 2026-10-13 23:41Z
last change 2026-10-21 14:43Z
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