CVE-2024-42949Public exploitNetwork attack vector

Router crash via unchecked qos copy

Published Aug 15, 2024 · Updated Aug 15, 2024

Stack-based buffer overflow in Tenda FH1201 Firmware 1.2.0.14 (408) allows remote attackers to crash the router via a crafted POST request. The fromqossetting handler copies the user-controlled qos value into the fixed-size v8 stack array with strcpy without checking its length. An unauthenticated attacker with network access to /goform/qossetting can overflow the array and interrupt routing service.

CVSS severity7.5
High
EPSS probability0.55%
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 FH1201 Firmware 1.2.0.14 (408) allows remote attackers to crash the router via a crafted POST request. The fromqossetting handler copies the user-controlled qos value into the fixed-size v8 stack array with strcpy without checking its length. An unauthenticated attacker with network access to /goform/qossetting can overflow the array and interrupt routing service.

The record

CVE
CVE-2024-42949
Published
Aug 15, 2024
Updated
Aug 15, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
FH1201 Firmware
Classifications
CWE-787, CWE-121, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=1.2.0.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · FH1201 Firmwareversion=1.2.0.14

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
T1499Endpoint Denial of Service

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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