CVE-2026-79377Network attack vector

Device crash via crafted L2CAP packet

Published Sep 8, 2026 · Updated Sep 8, 2026

Heap overflow in Bestechnic BES2300 firmware 3.x and earlier allows remote attackers to crash devices with a crafted L2CAP packet. The A2DP SBC packet path passes attacker-controlled frame data into the decoder, where processing overruns a heap buffer; the specific missing bounds check is undisclosed. Unauthenticated Bluetooth packet delivery is required, and the documented consequence is a service-interrupting device crash rather than data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in Bestechnic BES2300 firmware 3.x and earlier allows remote attackers to crash devices with a crafted L2CAP packet. The A2DP SBC packet path passes attacker-controlled frame data into the decoder, where processing overruns a heap buffer; the specific missing bounds check is undisclosed. Unauthenticated Bluetooth packet delivery is required, and the documented consequence is a service-interrupting device crash rather than data disclosure or modification.

The record

CVE
CVE-2026-79377
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-122, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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No observations available

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

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1499.004Application or System Exploitation Flood

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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