CVE-2026-58600

highpriority · track · 31EPSS 0.005 · 40 %ileDEUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.47% (40th) EPSS

CVSS 7.8 · high

Is it mine?

18 products

Check your exposure

Who says so?

3 sources

cert_bund · msrc_csaf · nvd

EPSS · scored 2026-10-28

Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to elevate privileges locally.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedHEVC Video Extensionsmsrc_csaf
2.4.87.0:Security Update:https://apps.microsoft.com/detail/9nmzlz57r3t7
https://apps.microsoft.com/detail/9nmzlz57r3t7
FixedHEVC Video Extensions for Licensed Applicationsmsrc_csaf
2.4.85.0:Security Update:https://apps.microsoft.com/detail/9p3wl96xzmxx
https://apps.microsoft.com/detail/9p3wl96xzmxx
FixedHEVC Video Extensions from Device Manufacturermsrc_csaf
2.4.86.0:Security Update:https://apps.microsoft.com/store/detail/hevc-video-extensions-from-device-manufacturer/9N4WGH0Z6VHQ?hl=en-us&gl=us
https://apps.microsoft.com/store/detail/hevc-video-extensions-from-device-manufacturer/9N4WGH0Z6VHQ?hl=en-us&gl=us

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · secure@microsoft.com USexploitability 1.8 · impact 5.9

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-122USCWE-122US

affected products (18)

Products and version ranges known to be affected.

Microsoft Windows 10all versionscert_bundDEcpe:/o:microsoft:windows_10:-
Microsoft Windows 11all versionscert_bundDEcpe:/o:microsoft:windows_11:-
Microsoft Windows Server 2012all versionscert_bundDEcpe:/o:microsoft:windows_server_2012:-
Microsoft Windows Server 2012 R2all versionscert_bundDEcpe:/o:microsoft:windows_server_2012_r2:-
Microsoft Windows Server 2016all versionscert_bundDEcpe:/o:microsoft:windows_server_2016:-
Microsoft Windows Server 2019all versionscert_bundDEcpe:/o:microsoft:windows_server_2019:-
Microsoft Windows Server 2022all versionscert_bundDEcpe:/o:microsoft:windows_server_2022:-
Microsoft Windows Server 2025all versionscert_bundDEcpe:/o:microsoft:windows_server_2025:-
Microsoft HEVC Video Extensionsall versionsfixedmsrc_csafUS
Microsoft HEVC Video Extensions< 2.4.87.0msrc_csafUS
Microsoft HEVC Video Extensions for Licensed Applicationsall versionsfixedmsrc_csafUS
Microsoft HEVC Video Extensions for Licensed Applications< 2.4.85.0msrc_csafUS
Microsoft HEVC Video Extensions from Device Manufacturerall versionsfixedmsrc_csafUS
Microsoft HEVC Video Extensions from Device Manufacturer< 2.5.25.0msrc_csafUS
microsoft hevc video extensions< 2.4.87.0nvdUScpe:2.3:a:microsoft:hevc_video_extensions:*:*:*:*:*:*:*:*
microsoft hevc video extensions for licensed applications< 2.4.85.0nvdUScpe:2.3:a:microsoft:hevc_video_extensions_for_licensed_applications:*:*:*:*:*:*:*:*
microsoft hevc video extensions from device manufacturer< 2.4.86.0nvdUScpe:2.3:a:microsoft:hevc_video_extensions_from_device_manufacturer:*:*:*:*:*:*:*:*
microsoft hevc video extensions from device manufacturer< 2.5.25.0nvdUScpe:2.3:a:microsoft:hevc_video_extensions_from_device_manufacturer:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3243Microsoft Windows: Mehrere SchwachstellenDeutsch2026-09-08csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen Versionen von Microsoft Windows Server, Microsoft Windows 10 und Microsoft Windows 11 ausnutzen, um seine Privilegien zu erhöhen, um einen Denial of Service herbeizuführen, um Informationen offenzulegen und um beliebigen Code auszuführen.
msrc_CVE-2026-58600HEVC Video Extensions Elevation of Privilege Vulnerability2026-09-08csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

sources

Which sources assert this record, and when.

cert_bund msrc_csaf nvd NVD CVE.org MITRE

published 2026-09-08modified 2026-10-01

references (1) nvd

External citations — patches, advisories, analysis.

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58600PatchVendor Advisory

scry

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