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CVE-2025-4821

🗓️ 18 Jun 2025 15:47:52Reported by cloudflareType 
cve
 cve
🔗 web.nvd.nist.gov👁 71 Views

Vulnerability in Cloudflare quiche causes incorrect congestion window growth, risking overflow panic.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
freebsd
FreeBSD
quiche -- Multiple vulnerabilities
18 Jun 202500:00
–freebsd
alpinelinux
AlpineLinux
CVE-2025-4821
18 Jun 202515:47
–alpinelinux
bdu_fstec
BDU FSTEC
CloudFlare Quiche DoS
24 Jun 202500:00
–bdu_fstec
circl
Circl
CVE-2025-4821
18 Jun 202516:30
–circl
cnnvd
CNNVD
Quiche security vulnerabilities
18 Jun 202500:00
–cnnvd
cvelist
Cvelist
CVE-2025-4821 Incorrect congestion window growth by invalid ACK ranges
18 Jun 202515:47
–cvelist
euvd
EUVD
EUVD-2025-18651
3 Oct 202520:07
–euvd
nessus
Tenable Nessus
FreeBSD : quiche -- Multiple vulnerabilities (7b0cbc73-9955-11f0-b6e2-6805ca2fa271)
26 Sep 202500:00
–nessus
mend
Mend
CVE-2025-4821
18 Jun 202515:47
–mend
nvd
NVD
CVE-2025-4821
18 Jun 202516:15
–nvd
Rows per page
NVD
Node
cloudflarequicheRange<0.24.4rust
[
  {
    "defaultStatus": "unaffected",
    "packageName": "cloudflare-quiche",
    "product": "quiche",
    "vendor": "Cloudflare",
    "versions": [
      {
        "status": "affected",
        "version": "<0.24.4"
      }
    ]
  }
]

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17 Jun 2026 09:34Current
7.1High risk
Vulners AI Score7.1
CVSS 3.17.5
EPSS0.00936
SSVC
71