7.5

CVE-2026-25667: microsoft .net Uncontrolled Resource Consumption

Modified
Published 19-03-2026Last modified 29-04-2026

Vulnerability summary

CVE-2026-25667 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in microsoft .net. EPSS estimates a 4.34% chance of exploitation in the next 30 days, higher than 91.1% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
41/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
4.34%
0%100%
Low · +1.34 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Timeline

  1. 19-03-2026
    PublishedVulnerability first disclosed.
  2. 29-04-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

4.34%

Chance of exploitation in the next 30 days

Percentile

91%

Versus all other CVEs

30-day change

Increase +1.34 pp

From 3.00% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Kestrel Dos

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Microsoft1 product
  • .net≥ 8.0.0, < 8.0.22 | ≥ 9.0.0, < 9.0.11

1 vendor · 1 product

References

3 links