CVE-2022-36233Public exploit

Service crash via unchecked SSID copy

Published Aug 19, 2022 · Updated Jul 9, 2026

Stack buffer overflow in Tenda AC9 firmware 15.03.2.13 allows local users to crash httpd through a crafted SSID. The form_fast_setting_wifi_set handler passes the unchecked ssid request parameter to strcpy, copying more than 96 bytes into a stack buffer and corrupting the saved r1 value. The published proof sends the oversized value to the fast Wi-Fi setup endpoint; low-privileged local access is required, and only a service crash was demonstrated.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in Tenda AC9 firmware 15.03.2.13 allows local users to crash httpd through a crafted SSID. The form_fast_setting_wifi_set handler passes the unchecked ssid request parameter to strcpy, copying more than 96 bytes into a stack buffer and corrupting the saved r1 value. The published proof sends the oversized value to the fast Wi-Fi setup endpoint; low-privileged local access is required, and only a service crash was demonstrated.

The record

CVE
CVE-2022-36233
Published
Aug 19, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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 vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Application 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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