CVE-2023-20689Network attack vector

Remote system crash via WLAN integer overflow

Published Jul 4, 2023 · Updated Dec 4, 2024

Integer overflow in MediaTek WLAN firmware on Android 11.0 and IOT-v23.0 devices allows remote attackers to crash the system. The firmware's WLAN input handling performs an overflowing integer calculation that results in a buffer overflow, but MediaTek has not disclosed the specific field, packet, or function involved. No authentication, execution privileges, or user interaction is required, and the documented consequence is limited to a remotely induced system crash.

CVSS severity7.5
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Integer overflow in MediaTek WLAN firmware on Android 11.0 and IOT-v23.0 devices allows remote attackers to crash the system. The firmware's WLAN input handling performs an overflowing integer calculation that results in a buffer overflow, but MediaTek has not disclosed the specific field, packet, or function involved. No authentication, execution privileges, or user interaction is required, and the documented consequence is limited to a remotely induced system crash.

The record

CVE
CVE-2023-20689
Published
Jul 4, 2023
Updated
Dec 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190, CWE-680, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

7.5NIST NVDCVSS: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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
CWE-680Integer Overflow to Buffer Overflow
T1499.004Application or System Exploitation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo