Microsoft · QUIC STREAM Fragment Metadata DoS
Affects MicrosoftSource GCVE Database
Not known to be exploited.
Data as of 14 Nov 2026, 09:18 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 3 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Security Response Center Microsoft | Affected
| Fixed in– |
Description
CVE-2026-54873 is a denial-of-service (DoS) vulnerability related to QUIC stream fragment metadata in Microsoft software versions 3.0 and 4.0. The vulnerability is categorized under CWE-770, which involves allocation of resources without limits or throttling, potentially leading to resource exhaustion.