CVE-2026-62815PublishedWithdrawn

Microsoft QUIC Remote Code Execution Vulnerability

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

CVE-2026-62815

No KEV entry is attached to this observation; this is not evidence that exploitation is absent.

FIRST EPSS: 0.97 % · percentile 62.36 % · scored 10 Nov 2026.

Observed 10 Nov 2026 20:24:10 UTC · Complete immutable risk JSON

cve-program · CVE-2026-62815

Published

Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

Source published: 11 Aug 2026 17:04:30 UTC
Source modified: 10 Nov 2026 21:58:14 UTC
Observed here: 10 Nov 2026 23:21:22 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

euvd · EUVD-2026-56392

Published

Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Aug 11, 2026, 5:04:30 PM

dateUpdated: Oct 30, 2026, 5:20:19 PM

2 related source bulletins · separate from aliases

msrc_CVE-2026-62815: Microsoft QUIC Remote Code Execution Vulnerability

CVE-2026-62815

NCSC-2026-0284: Kwetsbaarheden verholpen in Microsoft Windows

CVE-2026-50472 · CVE-2026-56174 · CVE-2026-54113 · CVE-2026-54984 · CVE-2026-49179 · CVE-2026-6727 · CVE-2026-59127 · CVE-2026-59128 · CVE-2026-59130 · CVE-2026-59132 · CVE-2026-59135 · CVE-2026-59134 · CVE-2026-59136 · CVE-2026-59137 · CVE-2026-59138 · CVE-2026-61345 · CVE-2026-61346 · CVE-2026-61353 · CVE-2026-61347 · CVE-2026-61348 · CVE-2026-61350 · CVE-2026-61356 · CVE-2026-61367 · CVE-2026-61923 · CVE-2026-61366 · CVE-2026-61368 · CVE-2026-61924 · CVE-2026-61925 · CVE-2026-61928 · CVE-2026-61930 · CVE-2026-61937 · CVE-2026-62692 · CVE-2026-61932 · CVE-2026-61936 · CVE-2026-61939 · CVE-2026-62690 · CVE-2026-62696 · CVE-2026-62699 · CVE-2026-62703 · CVE-2026-62707 · CVE-2026-62713 · CVE-2026-62712 · CVE-2026-62718 · CVE-2026-62715 · CVE-2026-62716 · CVE-2026-62719 · CVE-2026-62723 · CVE-2026-62724 · CVE-2026-62748 · CVE-2026-62729 · CVE-2026-62738 · CVE-2026-62746 · CVE-2026-62740 · CVE-2026-62753 · CVE-2026-62735 · CVE-2026-62739 · CVE-2026-62742 · CVE-2026-62745 · CVE-2026-62747 · CVE-2026-62750 · CVE-2026-62754 · CVE-2026-62783 · CVE-2026-62755 · CVE-2026-62758 · CVE-2026-62773 · CVE-2026-62774 · CVE-2026-62785 · CVE-2026-62777 · CVE-2026-62792 · CVE-2026-62784 · CVE-2026-62787 · CVE-2026-62795 · CVE-2026-62796 · CVE-2026-62797 · CVE-2026-62812 · CVE-2026-62816 · CVE-2026-62817 · CVE-2026-62818 · CVE-2026-62819 · CVE-2026-62820 · CVE-2026-62876 · CVE-2026-62877 · CVE-2026-62878 · CVE-2026-62889 · CVE-2026-62890 · CVE-2026-62892 · CVE-2026-62893 · CVE-2026-62894 · CVE-2026-62908 · CVE-2026-65662 · CVE-2026-65671 · CVE-2026-65678 · CVE-2026-65784 · CVE-2026-65786 · CVE-2026-65789 · CVE-2026-65787 · CVE-2026-65814 · CVE-2026-66799 · CVE-2026-68819 · CVE-2026-68820 · CVE-2026-70307 · CVE-2026-70304 · CVE-2026-70330 · CVE-2026-61352 · CVE-2026-70344 · CVE-2026-70345 · CVE-2026-70346 · CVE-2026-70347 · CVE-2026-42976 · CVE-2026-6726 · CVE-2026-59122 · CVE-2026-59125 · CVE-2026-59131 · CVE-2026-61349 · CVE-2026-61363 · CVE-2026-61364 · CVE-2026-61365 · CVE-2026-61358 · CVE-2026-61360 · CVE-2026-61920 · CVE-2026-61926 · CVE-2026-61918 · CVE-2026-61921 · CVE-2026-62698 · CVE-2026-62700 · CVE-2026-62701 · CVE-2026-62709 · CVE-2026-62710 · CVE-2026-62711 · CVE-2026-62720 · CVE-2026-62714 · CVE-2026-62717 · CVE-2026-62721 · CVE-2026-62725 · CVE-2026-62726 · CVE-2026-62728 · CVE-2026-62733 · CVE-2026-62743 · CVE-2026-62730 · CVE-2026-62732 · CVE-2026-62734 · CVE-2026-62757 · CVE-2026-62741 · CVE-2026-62752 · CVE-2026-62769 · CVE-2026-62771 · CVE-2026-62761 · CVE-2026-62768 · CVE-2026-62770 · CVE-2026-62776 · CVE-2026-62778 · CVE-2026-62782 · CVE-2026-62781 · CVE-2026-62800 · CVE-2026-62786 · CVE-2026-62790 · CVE-2026-62793 · CVE-2026-62803 · CVE-2026-62807 · CVE-2026-62814 · CVE-2026-62823 · CVE-2026-62822 · CVE-2026-62880 · CVE-2026-62881 · CVE-2026-62883 · CVE-2026-62885 · CVE-2026-62887 · CVE-2026-65681 · CVE-2026-65679 · CVE-2026-65773 · CVE-2026-65774 · CVE-2026-65775 · CVE-2026-65790 · CVE-2026-65791 · CVE-2026-65795 · CVE-2026-65794 · CVE-2026-65797 · CVE-2026-65799 · CVE-2026-65798 · CVE-2026-65796 · CVE-2026-66802 · CVE-2026-71331 · CVE-2026-62695 · CVE-2026-62702 · CVE-2026-62815 · CVE-2026-65672 · CVE-2026-59126 · CVE-2026-61359 · CVE-2026-61355 · CVE-2026-62751 · CVE-2026-62811 · CVE-2026-62832 · CVE-2026-62888 · CVE-2026-65777 · CVE-2026-61361 · CVE-2026-61927 · CVE-2026-61933 · CVE-2026-61934 · CVE-2026-62722 · CVE-2026-62737 · CVE-2026-62766 · CVE-2026-62779 · CVE-2026-62798 · CVE-2026-65785 · CVE-2026-65788 · CVE-2026-61357 · CVE-2026-61929 · CVE-2026-61938 · CVE-2026-62708 · CVE-2026-62736 · CVE-2026-62749 · CVE-2026-62780 · CVE-2026-62788 · CVE-2026-65776 · CVE-2026-56179 · CVE-2026-62688 · CVE-2026-62705 · CVE-2026-66804 · CVE-2026-62693 · CVE-2026-65783 · CVE-2026-70348 · CVE-2026-65779 · CVE-2026-65780 · CVE-2026-65778 · CVE-2026-65782 · CVE-2026-65781 · CVE-2026-62772 · CVE-2026-62775 · CVE-2026-62799 · CVE-2026-62824 · CVE-2026-59124 · CVE-2026-59133

Source published: Aug 11, 2026, 5:04:30 PM (timezone not stated)
Source modified: Oct 30, 2026, 5:20:19 PM (timezone not stated)
Observed here: 10 Nov 2026 02:10:41 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 3.1 · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

nvd · CVE-2026-62815

Published

Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-416

Original publisher date fields

published: 2026-08-11T17:18:35.320

lastModified: 2026-08-14T18:46:24.667

10 source CPE criteria · context only

cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 11 Aug 2026 17:18:35 UTC
Source modified: 14 Aug 2026 18:46:24 UTC
Observed here: 25 Oct 2026 14:19:28 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · [email protected] · Secondary · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

osv · GHSA-2q33-cf8w-7q23

Withdrawn

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-92f5-vc22-8j33. This link is maintained to preserve external references. ## Original Description Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

Source published: 11 Aug 2026 18:31:26 UTC
Source modified: 8 Sep 2026 20:45:05 UTC
Observed here: 23 Oct 2026 16:01:25 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Publisher rating · CRITICAL

osv · GHSA-92f5-vc22-8j33

Published

# Summary Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network. # Details New network path creations and removals triggered by incoming packets can lead to a pointer invalidation. ## Patches - Guard path promotion [e0f55b5](https://github.com/microsoft/msquic/commit/e0f55b5fdc9fff0b4465976d066ebd22fb7e2b3b) # Impact An unauthenticated attacker could exploit this vulnerability by sending a specially crafted packet to an affected service over the network. Successful exploitation could allow the attacker to execute code on the target system. No authentication or user interaction is required.

Source published: 8 Sep 2026 20:27:02 UTC
Source modified: 8 Sep 2026 20:55:58 UTC
Observed here: 23 Oct 2026 16:01:25 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Publisher rating · CRITICAL