CVE-2023-27239Network attack vector

Unauthenticated memory corruption via oversized shareSpeed input

Published Mar 15, 2023 · Updated Feb 27, 2025

Stack overflow in Tenda AX3 firmware 16.03.12.11 allows remote attackers to corrupt memory through a crafted shareSpeed value. The WifiGuestSet handler accepts the shareSpeed parameter without an effective length bound, allowing the value to overrun stack storage. No authentication or user interaction is required; public records do not establish whether exploitation yields code execution or only service interruption.

CVSS severity9.8
Critical
EPSS probability0.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in Tenda AX3 firmware 16.03.12.11 allows remote attackers to corrupt memory through a crafted shareSpeed value. The WifiGuestSet handler accepts the shareSpeed parameter without an effective length bound, allowing the value to overrun stack storage. No authentication or user interaction is required; public records do not establish whether exploitation yields code execution or only service interruption.

The record

CVE
CVE-2023-27239
Published
Mar 15, 2023
Updated
Feb 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 2025Record 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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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.

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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-787Out-of-bounds Write
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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