CVE-2023-26976Public exploitNetwork attack vector

Router service interruption via unchecked SSID copy

Published Apr 4, 2023 · Updated Feb 13, 2025

Stack-based buffer overflow in Tenda AC6 firmware 15.03.05.09_multi allows remote attackers to interrupt router service via a crafted SSID. The form_fast_setting_wifi_set function passes the user-controlled ssid parameter to strcpy without checking its length, overflowing a stack buffer. No authentication is required; the published material establishes denial of service but does not specify whether the device hangs, crashes, or reboots.

CVSS severity7.5
High
EPSS probability15.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Tenda AC6 firmware 15.03.05.09_multi allows remote attackers to interrupt router service via a crafted SSID. The form_fast_setting_wifi_set function passes the user-controlled ssid parameter to strcpy without checking its length, overflowing a stack buffer. No authentication is required; the published material establishes denial of service but does not specify whether the device hangs, crashes, or reboots.

The record

CVE
CVE-2023-26976
Published
Apr 4, 2023
Updated
Feb 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

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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