CVE-2025-27481 - Windows Telephony Service Remote Code Execution Vulnerability

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HIGH

Windows Telephony Service Remote Code Execution Vulnerability

Published Apr 8, 2025

8.8

HIGH

CVSS 3.1

EPSS 1.22%

Description

Stack-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to execute code over a network.

Affected products

Vendor Microsoft Product Windows 10 Version 1507 Default
n/a
- Version
  10.0.10240.0
  Status
  affected
  Constraints
  <10.0.10240.20978
Vendor Microsoft Product Windows 10 Version 1607 Default
n/a
- Version
  10.0.14393.0
  Status
  affected
  Constraints
  <10.0.14393.7969
Vendor Microsoft Product Windows 10 Version 1809 Default
n/a
- Version
  10.0.17763.0
  Status
  affected
  Constraints
  <10.0.17763.7136
Vendor Microsoft Product Windows 10 Version 21H2 Default
n/a
- Version
  10.0.19044.0
  Status
  affected
  Constraints
  <10.0.19044.5737
Vendor Microsoft Product Windows 10 Version 22H2 Default
n/a
- Version
  10.0.19045.0
  Status
  affected
  Constraints
  <10.0.19045.5737
Vendor Microsoft Product Windows 11 Version 23H2 Default
n/a
- Version
  10.0.22631.0
  Status
  affected
  Constraints
  <10.0.22631.5189
Vendor Microsoft Product Windows 11 Version 24H2 Default
n/a
- Version
  10.0.26100.0
  Status
  affected
  Constraints
  <10.0.26100.3775
Vendor Microsoft Product Windows 11 version 22H2 Default
n/a
- Version
  10.0.22621.0
  Status
  affected
  Constraints
  <10.0.22621.5189
Vendor Microsoft Product Windows 11 version 22H3 Default
n/a
- Version
  10.0.22631.0
  Status
  affected
  Constraints
  <10.0.22631.5189
Vendor Microsoft Product Windows Server 2008 R2 Service Pack 1 Default
n/a
- Version
  6.1.7601.0
  Status
  affected
  Constraints
  <6.1.7601.27670
Vendor Microsoft Product Windows Server 2008 R2 Service Pack 1 (Server Core installation) Default
n/a
- Version
  6.1.7601.0
  Status
  affected
  Constraints
  <6.1.7601.27670
Vendor Microsoft Product Windows Server 2008 Service Pack 2 Default
n/a
- Version
  6.0.6003.0
  Status
  affected
  Constraints
  <6.0.6003.23220
Vendor Microsoft Product Windows Server 2008 Service Pack 2 (Server Core installation) Default
n/a
- Version
  6.0.6003.0
  Status
  affected
  Constraints
  <6.0.6003.23220
Vendor Microsoft Product Windows Server 2012 Default
n/a
- Version
  6.2.9200.0
  Status
  affected
  Constraints
  <6.2.9200.25423
Vendor Microsoft Product Windows Server 2012 (Server Core installation) Default
n/a
- Version
  6.2.9200.0
  Status
  affected
  Constraints
  <6.2.9200.25423
Vendor Microsoft Product Windows Server 2012 R2 Default
n/a
- Version
  6.3.9600.0
  Status
  affected
  Constraints
  <6.3.9600.22523
Vendor Microsoft Product Windows Server 2012 R2 (Server Core installation) Default
n/a
- Version
  6.3.9600.0
  Status
  affected
  Constraints
  <6.3.9600.22523
Vendor Microsoft Product Windows Server 2016 Default
n/a
- Version
  10.0.14393.0
  Status
  affected
  Constraints
  <10.0.14393.7969
Vendor Microsoft Product Windows Server 2016 (Server Core installation) Default
n/a
- Version
  10.0.14393.0
  Status
  affected
  Constraints
  <10.0.14393.7969
Vendor Microsoft Product Windows Server 2019 Default
n/a
- Version
  10.0.17763.0
  Status
  affected
  Constraints
  <10.0.17763.7136
Vendor Microsoft Product Windows Server 2019 (Server Core installation) Default
n/a
- Version
  10.0.17763.0
  Status
  affected
  Constraints
  <10.0.17763.7136
Vendor Microsoft Product Windows Server 2022 Default
n/a
- Version
  10.0.20348.0
  Status
  affected
  Constraints
  <10.0.20348.3453
Vendor Microsoft Product Windows Server 2022, 23H2 Edition (Server Core installation) Default
n/a
- Version
  10.0.25398.0
  Status
  affected
  Constraints
  <10.0.25398.1551
Vendor Microsoft Product Windows Server 2025 Default
n/a
- Version
  10.0.26100.0
  Status
  affected
  Constraints
  <10.0.26100.3775
Vendor Microsoft Product Windows Server 2025 (Server Core installation) Default
n/a
- Version
  10.0.26100.0
  Status
  affected
  Constraints
  <10.0.26100.3775

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Microsoft

Windows 10 Version 1507

n/a

Version	Status	Constraints
10.0.10240.0	affected	<10.0.10240.20978

Microsoft

Windows 10 Version 1607

n/a

Version	Status	Constraints
10.0.14393.0	affected	<10.0.14393.7969

Microsoft

Windows 10 Version 1809

n/a

Version	Status	Constraints
10.0.17763.0	affected	<10.0.17763.7136

Microsoft

Windows 10 Version 21H2

n/a

Version	Status	Constraints
10.0.19044.0	affected	<10.0.19044.5737

Microsoft

Windows 10 Version 22H2

n/a

Version	Status	Constraints
10.0.19045.0	affected	<10.0.19045.5737

Microsoft

Windows 11 Version 23H2

n/a

Version	Status	Constraints
10.0.22631.0	affected	<10.0.22631.5189

Microsoft

Windows 11 Version 24H2

n/a

Version	Status	Constraints
10.0.26100.0	affected	<10.0.26100.3775

Microsoft

Windows 11 version 22H2

n/a

Version	Status	Constraints
10.0.22621.0	affected	<10.0.22621.5189

Microsoft

Windows 11 version 22H3

n/a

Version	Status	Constraints
10.0.22631.0	affected	<10.0.22631.5189

Microsoft

Windows Server 2008 R2 Service Pack 1

n/a

Version	Status	Constraints
6.1.7601.0	affected	<6.1.7601.27670

Microsoft

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

n/a

Version	Status	Constraints
6.1.7601.0	affected	<6.1.7601.27670

Microsoft

Windows Server 2008 Service Pack 2

n/a

Version	Status	Constraints
6.0.6003.0	affected	<6.0.6003.23220

Microsoft

Windows Server 2008 Service Pack 2 (Server Core installation)

n/a

Version	Status	Constraints
6.0.6003.0	affected	<6.0.6003.23220

Microsoft

Windows Server 2012

n/a

Version	Status	Constraints
6.2.9200.0	affected	<6.2.9200.25423

Microsoft

Windows Server 2012 (Server Core installation)

n/a

Version	Status	Constraints
6.2.9200.0	affected	<6.2.9200.25423

Microsoft

Windows Server 2012 R2

n/a

Version	Status	Constraints
6.3.9600.0	affected	<6.3.9600.22523

Microsoft

Windows Server 2012 R2 (Server Core installation)

n/a

Version	Status	Constraints
6.3.9600.0	affected	<6.3.9600.22523

Microsoft

Windows Server 2016

n/a

Version	Status	Constraints
10.0.14393.0	affected	<10.0.14393.7969

Microsoft

Windows Server 2016 (Server Core installation)

n/a

Version	Status	Constraints
10.0.14393.0	affected	<10.0.14393.7969

Microsoft

Windows Server 2019

n/a

Version	Status	Constraints
10.0.17763.0	affected	<10.0.17763.7136

Microsoft

Windows Server 2019 (Server Core installation)

n/a

Version	Status	Constraints
10.0.17763.0	affected	<10.0.17763.7136

Microsoft

Windows Server 2022

n/a

Version	Status	Constraints
10.0.20348.0	affected	<10.0.20348.3453

Microsoft

Windows Server 2022, 23H2 Edition (Server Core installation)

n/a

Version	Status	Constraints
10.0.25398.0	affected	<10.0.25398.1551

Microsoft

Windows Server 2025

n/a

Version	Status	Constraints
10.0.26100.0	affected	<10.0.26100.3775

Microsoft

Windows Server 2025 (Server Core installation)

n/a

Version	Status	Constraints
10.0.26100.0	affected	<10.0.26100.3775

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-121

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27481
vendor-advisorypatchVendor Advisory

Link	Providers	Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27481		vendor-advisorypatchVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner microsoft

Published Apr 8, 2025

Updated Aug 10, 2026

Reserved Feb 26, 2025

Link CVE-2025-27481

CISA Vulnrichment

Updated Apr 8, 2025

NVD

Status Analyzed

Modified Jun 17, 2026

Link CVE-2025-27481

Red Hat

Severity n/a

Public date n/a

Links CVE-2025-27481

ENISA EUVD

Assigner n/a

Published n/a

Updated n/a

Exploited since n/a

Link n/a