CVE-2024-32311

Service interruption via unchecked WAN password length

Published Apr 17, 2024 · Updated Aug 2, 2024

Stack-based buffer overflow in Tenda FH1203 firmware 2.0.1.6 allows remote attackers to interrupt service via a crafted WAN password. formWanParameterSetting accepts the adslPwd value without validating its length, allowing it to overrun a stack buffer. No authentication or user interaction is required, but the attacker must reach the router from an adjacent network; the bounded impact is service interruption.

CVSS severity6.5
Medium
EPSS probability0.50%
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 FH1203 firmware 2.0.1.6 allows remote attackers to interrupt service via a crafted WAN password. formWanParameterSetting accepts the adslPwd value without validating its length, allowing it to overrun a stack buffer. No authentication or user interaction is required, but the attacker must reach the router from an adjacent network; the bounded impact is service interruption.

The record

CVE
CVE-2024-32311
Published
Apr 17, 2024
Updated
Aug 2, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
FH1203 Firmware
Classifications
CWE-121, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 17, 2024CVE 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

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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=2.0.1.6

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · FH1203 Firmwareversion=2.0.1.6

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499.004Application or System Exploitation

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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