CVE-2023-24333Public exploit

Arbitrary command execution via openSchedWifi stack overflow

Published Feb 21, 2024 · Updated Aug 28, 2024

Stack overflow in Tenda AC21 Firmware US_AC21V1.0re_V16.03.08.15_cn_TDC01 allows remote attackers to run commands via a crafted POST request. Published materials identify the openSchedWifi handler but do not disclose which POST field or unsafe operation overruns its stack buffer. An unauthenticated attacker on an adjacent network can execute commands with the web service's privileges and compromise router operation and data.

CVSS severity8.8
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in Tenda AC21 Firmware US_AC21V1.0re_V16.03.08.15_cn_TDC01 allows remote attackers to run commands via a crafted POST request. Published materials identify the openSchedWifi handler but do not disclose which POST field or unsafe operation overruns its stack buffer. An unauthenticated attacker on an adjacent network can execute commands with the web service's privileges and compromise router operation and data.

The record

CVE
CVE-2023-24333
Published
Feb 21, 2024
Updated
Aug 28, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC21 Firmware
Classifications
CWE-94, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2024Record 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=us_ac21v1.0re_v16.03.08.15_cn_tdc01

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC21 Firmwareversion=us_ac21v1.0re_v16.03.08.15_cn_tdc01

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/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.

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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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1210Exploitation of Remote Services

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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