CVE-2024-2856Public exploitNetwork attack vector

Remote code execution via unchecked timeZone copy

Published Mar 24, 2024 · Updated Aug 21, 2024

Stack-based buffer overflow in Tenda AC10 16.03.10.13 and 16.03.10.20 allows remote authenticated users to execute code. The fromSetSysTime handler for /goform/SetSysTimeCfg copies an attacker-controlled timeZone value into a fixed-size stack buffer without checking its length. Low-privileged web-management access is required; the overflow can corrupt saved control data, crash the service, or redirect execution.

CVSS severity9.8
Critical
EPSS probability1.16%
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 AC10 16.03.10.13 and 16.03.10.20 allows remote authenticated users to execute code. The fromSetSysTime handler for /goform/SetSysTimeCfg copies an attacker-controlled timeZone value into a fixed-size stack buffer without checking its length. Low-privileged web-management access is required; the overflow can corrupt saved control data, crash the service, or redirect execution.

The record

CVE
CVE-2024-2856
Published
Mar 24, 2024
Updated
Aug 21, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC10
Classifications
CWE-121, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 24, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 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=16.03.10.13
  2. Affected versionversion=16.03.10.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC10version=16.03.10.13; version=16.03.10.20
Shenzhen Tenda Technology Co., Ltd. · Tenda AC10 Firmwareversion=16.03.10.13; version=16.03.10.20

Published CVSS scores

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
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8VulDBCVSS:3.0/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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Your stack

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