CVE-2026-1420Public exploitNetwork attack vector

Authenticated code execution via WifiExtraSet buffer overflow

Published Jan 26, 2026 · Updated Jan 26, 2026

A buffer overflow in Tenda AC23 firmware 16.03.07.52 allows remote authenticated users to execute code via WifiExtraSet. Published sources identify the /goform/WifiExtraSet handler and its wpapsk_crypto argument but do not disclose the exact unsafe copy operation or buffer layout. Network access and low-privilege authentication to the management interface are required; successful exploitation permits code execution on the router.

CVSS severity8.8
High
EPSS probability3.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

A buffer overflow in Tenda AC23 firmware 16.03.07.52 allows remote authenticated users to execute code via WifiExtraSet. Published sources identify the /goform/WifiExtraSet handler and its wpapsk_crypto argument but do not disclose the exact unsafe copy operation or buffer layout. Network access and low-privilege authentication to the management interface are required; successful exploitation permits code execution on the router.

The record

CVE
CVE-2026-1420
Published
Jan 26, 2026
Updated
Jan 26, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC23
Classifications
CWE-119, CWE-120, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 26, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=16.03.07.52

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC23version=16.03.07.52

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.4VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1190Exploit Public-Facing Application

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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