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CVE-2026-25667Disclosure(microsoft / .net)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

ASP.NET Core Kestrel in Microsoft .NET 8.0 before 8.0.22 and .NET 9.0 before 9.0.11 allows a remote attacker to cause excessive CPU consumption by sending a crafted QUIC packet, because of an incorrect exit condition for HTTP/3 Encoder/Decoder stream processing.

microsoft CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Other references
Weakness type (CWE)
CWE-400

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • .net

Threat summary

  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 2 classified signals
  • Peaked 1d ago at 1 mentions (2026-03-19); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
microsoft
Products
.net

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-03-19: 1Mentions · 2026-03-23: 1Technical Details · 2026-03-23: 103-1903-23
Signal classification1 categories
Disclosure
2100.0%
Referenced assets3 URLs
Full discourse2 posts
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-25667 http://ASP.NET Core Kestrel HTTP/3 Encoder/Decoder Stream Processing Remote CPU Consumption Vulnerability https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-25667

    Post summary

    The text announces CVE‑2026‑25667, a remote CPU consumption vulnerability in ASP.NET Core Kestrel’s HTTP/3 encoder/decoder, and links to a vulnerability details page, but provides no evidence of exploitation, PoC, patch, or detailed technical analysis.

    0000150
    4.0K followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-25667 http://ASP.NET Core Kestrel in Microsoft .NET 8.0 before 8.0.22 and .NET 9.0 before 9.0.11 allows a remote attacker to cause excessive CPU consumption by sending a crafted Q… https://www.cve.org/CVERecord?id=CVE-2026-25667

    Post summary

    The post announces CVE-2026-25667 as a CPU (DoS) vulnerability affecting ASP.NET Core Kestrel in .NET 8.0 and 9.0 before certain releases, with no PoC, exploit, or patch information provided.

    00000166
    56.8K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appmicrosoft.net---

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