CVE-2023-35387

Privilege escalation via Bluetooth A2DP integer underflow

Published Aug 8, 2023 · Updated Aug 10, 2026

Integer underflow in the Microsoft Windows Bluetooth A2DP driver allows physically proximate attackers to elevate privileges after user interaction. Microsoft identifies CWE-191 in the A2DP driver but has not disclosed the affected calculation or how crafted Bluetooth input reaches it. An attacker must be within Bluetooth range and induce a user to interact; successful exploitation crosses a security boundary and grants elevated privileges.

CVSS severity8.8
High
EPSS probability1.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer underflow in the Microsoft Windows Bluetooth A2DP driver allows physically proximate attackers to elevate privileges after user interaction. Microsoft identifies CWE-191 in the A2DP driver but has not disclosed the affected calculation or how crafted Bluetooth input reaches it. An attacker must be within Bluetooth range and induce a user to interact; successful exploitation crosses a security boundary and grants elevated privileges.

The record

CVE
CVE-2023-35387
Published
Aug 8, 2023
Updated
Aug 10, 2026
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-191, T1068
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.10240.0 <10.0.10240.20107

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.20107
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.4737
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.6167
Microsoft · Windows 11 version 21H2version=10.0.22000.0 <10.0.22000.2295
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.24414
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.24414
Microsoft · Windows 10 Version 21H2version=10.0.19044.0 <10.0.19044.3324
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.6167
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.3324
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.21503
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.4737
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.2134
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.6167
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.4737; version=10.0.17763.0 <10.0.17763.4737
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.21503

Published CVSS scores

8.8MicrosoftCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-191Integer Underflow (Wrap or Wraparound)
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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