CVE-2023-41558Network attack vector

Unauthenticated memory corruption via oversized timeZone parameter

Published Aug 30, 2023 · Updated Oct 1, 2024

Stack overflow in Tenda AC7 firmware 1.0 V15.03.06.44 allows remote attackers to corrupt memory through the timeZone parameter. The /goform/SetSysTimeCfg handler accepts the value without an effective length bound, allowing it to overwrite the handler's stack buffer. No authentication or user interaction is required, and triggering the condition corrupts the router process rather than merely changing its time configuration.

CVSS severity9.8
Critical
EPSS probability0.84%
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 AC7 firmware 1.0 V15.03.06.44 allows remote attackers to corrupt memory through the timeZone parameter. The /goform/SetSysTimeCfg handler accepts the value without an effective length bound, allowing it to overwrite the handler's stack buffer. No authentication or user interaction is required, and triggering the condition corrupts the router process rather than merely changing its time configuration.

The record

CVE
CVE-2023-41558
Published
Aug 30, 2023
Updated
Oct 1, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC7
Classifications
CWE-787
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 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=1.0_v15.03.06.44

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC7version=1.0_v15.03.06.44

Published CVSS scores

9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/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

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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