CVE-2026-36772Public exploitNetwork attack vector

Service interruption via unchecked CGI index

Published Jun 9, 2026 · Updated Jun 9, 2026

Stack-based buffer overflow in Tenda W3 Wireless Router 1.0.0.3(2204) allows attackers to crash or reboot the device via crafted HTTP input. The formwrlSSIDget CGI handler passes an attacker-controlled index to sprintf for a fixed-size stack buffer without validating its length. A request must reach the web interface with wl_radio set to 0 and an overlong index, triggering memory corruption and service interruption.

CVSS severity6.5
Medium
EPSS probability0.18%
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 W3 Wireless Router 1.0.0.3(2204) allows attackers to crash or reboot the device via crafted HTTP input. The formwrlSSIDget CGI handler passes an attacker-controlled index to sprintf for a fixed-size stack buffer without validating its length. A request must reach the web interface with wl_radio set to 0 and an overlong index, triggering memory corruption and service interruption.

The record

CVE
CVE-2026-36772
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1499.004
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 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 vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/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)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499.004Application or System Exploitation Denial of Service

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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