CVE-2024-42983Public exploitNetwork attack vector

Service interruption via unchecked password decoding

Published Aug 15, 2024 · Updated Aug 15, 2024

Stack-based buffer overflow in Tenda FH1206 02.03.01.35 allows remote attackers to interrupt router service via a crafted POST request. The fromAdvSetWan handler passes attacker-controlled pptpPPW data to decodePwd, which copies bytes into the fixed-size v52 stack buffer without a bounds check. The request must reach the AdvSetWan management endpoint with wanmode set to 3, and overflowing the buffer interrupts 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 FH1206 02.03.01.35 allows remote attackers to interrupt router service via a crafted POST request. The fromAdvSetWan handler passes attacker-controlled pptpPPW data to decodePwd, which copies bytes into the fixed-size v52 stack buffer without a bounds check. The request must reach the AdvSetWan management endpoint with wanmode set to 3, and overflowing the buffer interrupts routing service.

The record

CVE
CVE-2024-42983
Published
Aug 15, 2024
Updated
Aug 15, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
FH1206
Classifications
CWE-121, CWE-787, T1499.004
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=02.03.01.35

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · FH1206version=02.03.01.35

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

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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