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NVD / CVE Program· CNA microsoft

CVE-2026-58600: HEVC Video Extensions Elevation of Privilege Vulnerability

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.46% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: HEVC Video Extensions 2.4.87.0; HEVC Video Extensions for Licensed Applications 2.4.85.0; HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for 32-bit Systems 2.4.86.0.

Low priority for now. Upgrade to HEVC Video Extensions 2.4.87.0; HEVC Video Extensions for Licensed Applications 2.4.85.0; HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for 32-bit Systems 2.4.86.0 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Sep 8, 2026
Updated
Oct 8, 2026
EPSS
0.4% · 40th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
7.8
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-58600

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
microsofthevc video extensions
microsofthevc video extensions for licensed applications
microsofthevc video extensions from device manufacturer
microsoftwindows 10 1809
microsoftwindows 10 21h2
microsoftwindows 10 22h2
microsoftwindows 11 22h2
microsoftwindows 11 23h2
microsoftwindows 11 24h2
microsoftwindows server 2019
microsoftwindows server 2022
microsoftwindows server 2025

and 2 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft hevc video extensionsbefore 2.4.87.0
  • microsoft hevc video extensions for licensed applicationsbefore 2.4.85.0
  • microsoft hevc video extensions from device manufacturerbefore 2.4.86.0
  • microsoft hevc video extensions from device manufacturerbefore 2.5.25.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft HEVC Video Extensions

    • 1.0.0 and later · before 2.4.87.0affected

  • Microsoft HEVC Video Extensions for Licensed Applications

    • 2.0.0.0 and later · before 2.4.85.0affected

  • Microsoft HEVC Video Extensions from Device Manufacturer

    • 2.0.0.0 and later · before 2.4.86.0affected

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-108400HEVC Video Extensions Remote Code Execution Vulnerability
    35Monitor
  • CVE-2022-30188HEVC Video Extensions Remote Code Execution Vulnerability
    32Monitor
  • CVE-2022-29119HEVC Video Extensions Remote Code Execution Vulnerability
    32Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2022-29111Jun 15, 2022 · HEVC Video Extensions Remote Code Execution Vulnerability
    32Monitor
  • ← EarlierCVE-2023-38170Aug 8, 2023 · HEVC Video Extensions Remote Code Execution Vulnerability
    31Monitor
  • ← EarlierCVE-2026-58599Sep 8, 2026 · HEVC Video Extensions Remote Code Execution Vulnerability
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
HEVC Video Extensions2.4.87.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions for Licensed Applications2.4.85.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for 32-bit Systems2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for x64-based Systems2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for 32-bit Systems2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for ARM64-based Systems2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for x64-based Systems2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for 32-bit Systems2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for ARM64-based Systems2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for x64-based Systems2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 for ARM64-based Systems2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 for x64-based Systems2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 for ARM64-based Systems2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 for x64-based Systems2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 for ARM64-based Systems2.5.25.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 for x64-based Systems2.5.25.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 11 Version 26H1 for ARM64-based Systems2.5.25.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows 11 version 26H1 for x64-based Systems2.5.25.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows Server 20192.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows Server 2019 (Server Core installation)2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows Server 20222.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows Server 2022 (Server Core installation)2.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows Server 20252.4.86.0 · Update InformationMicrosoft (MSRC)
HEVC Video Extensions from Device Manufacturer on Windows Server 2025 (Server Core installation)2.4.86.0 · Update InformationMicrosoft (MSRC)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-585990 days apartHEVC Video Extensions Remote Code Execution Vulnerability
    31Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records