CVE-2023-2923Public exploitNetwork attack vector

Unauthenticated code execution via unchecked page length

Published May 27, 2023 · Updated Aug 2, 2024

Stack-based buffer overflow in Tenda AC6 US_AC6V1.0BR_V15.03.05.19 allows remote attackers to execute code through the page parameter. The fromDhcpListClient handler passes that value to sprintf without a length check, overflowing its fixed-size stack buffer. An unauthenticated HTTP request to /goform/DhcpListClient can crash the service or redirect control flow to execute code on the router.

CVSS severity9.8
Critical
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stack-based buffer overflow in Tenda AC6 US_AC6V1.0BR_V15.03.05.19 allows remote attackers to execute code through the page parameter. The fromDhcpListClient handler passes that value to sprintf without a length check, overflowing its fixed-size stack buffer. An unauthenticated HTTP request to /goform/DhcpListClient can crash the service or redirect control flow to execute code on the router.

The record

CVE
CVE-2023-2923
Published
May 27, 2023
Updated
Aug 2, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC6
Classifications
CWE-787, CWE-121, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=US_AC6V1.0BR_V15.03.05.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC6version=US_AC6V1.0BR_V15.03.05.19

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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
CWE-121Stack-based 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo