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NVD / CVE Program· CNA microsoft

CVE-2021-43245: Windows Digital TV Tuner Elevation of Privilege Vulnerability

HighCVSS 7.8 · v3.1—No exploit No fix recorded

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: 0.54% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

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

Published
Dec 15, 2021
Updated
Jun 17, 2026
EPSS
0.5% · 46th percentile
CWE
—

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 · 0.5%

CNA vs NVD score

NVD
7.8
CNA · microsoft
7.8
agree

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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
  • No fixed version yet

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

Follow CVE-2021-43245

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
microsoftwindows 7
microsoftwindows 8.1
microsoftwindows rt 8.1
microsoftwindows server 2008
microsoftwindows server 2012

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 Windows 7

    • 6.1.0 and later · before 6.1.7601.26022affected

  • Microsoft Windows 7 Service Pack 1

    • 6.1.0 and later · before 6.1.7601.26022affected

  • Microsoft Windows 8.1

    • 6.3.0 and later · before 6.3.9600.20478affected

  • Microsoft Windows Server 2008 R2 Service Pack 1

    • 6.1.0 and later · before 6.1.7601.26022affected

  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)

    • 6.0.0 and later · before 6.1.7601.26022affected

  • Microsoft Windows Server 2012

    • 6.2.0 and later · before 6.2.9200.23771affected

  • Microsoft Windows Server 2012 (Server Core installation)

    • 6.2.0 and later · before 6.2.9200.23771affected

  • Microsoft Windows Server 2012 R2

    • 6.3.0 and later · before 6.3.9600.20478affected

  • Microsoft Windows Server 2012 R2 (Server Core installation)

    • 6.3.0 and later · before 6.3.9600.20478affected

Affected versions

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

  • microsoft windows server 2008r2
  • microsoft windows server 2012all versions
  • microsoft windows server 2012r2

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-0708A remote code execution vulnerability exists in Remote Desktop Services formerly known as Terminal Services when an unauthenticated…KEV
    99Now
  • CVE-2015-1635HTTP.sys in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8, Windows 8.1, and Windows Server 2012 Gold and R2 allows remote…KEV
    99Now
  • CVE-2014-6332OleAut32.dll in OLE in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8…KEV
    93Now

Published before and after this one in the same product

  • ← EarlierCVE-2021-36968Sep 15, 2021 · Windows DNS Elevation of Privilege Vulnerability
    31Monitor
  • ← EarlierCVE-2021-40441Dec 15, 2021 · Windows Media Center Elevation of Privilege Vulnerability
    31Monitor
  • Later →CVE-2022-21925Jan 11, 2022 · Windows BackupKey Remote Protocol Security Feature Bypass Vulnerability
    22Monitor

Remediation

Which version to upgrade to

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

No fix version is recorded for this entry. Check the references for vendor advisories.

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.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • 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
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

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

All records