CVE-2024-42940Public exploit

Service interruption via unbounded page formatting

Published Aug 15, 2024 · Updated Sep 3, 2024

Stack overflow in fromP2pListFilter in Tenda FH1201 Firmware 1.2.0.14(408) allows attackers to interrupt service via a crafted POST request. The function uses sprintf to place the unbounded page value into the fixed-size v11 stack buffer when constructing a p2p.asp URL. Reachability is through the router web interface; CISA assesses adjacent access with low privileges, while NIST assesses unauthenticated network access, and neither specifies whether denial of service is a process crash or device reboot.

CVSS severity7.5
High
EPSS probability0.68%
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 fromP2pListFilter in Tenda FH1201 Firmware 1.2.0.14(408) allows attackers to interrupt service via a crafted POST request. The function uses sprintf to place the unbounded page value into the fixed-size v11 stack buffer when constructing a p2p.asp URL. Reachability is through the router web interface; CISA assesses adjacent access with low privileges, while NIST assesses unauthenticated network access, and neither specifies whether denial of service is a process crash or device reboot.

The record

CVE
CVE-2024-42940
Published
Aug 15, 2024
Updated
Sep 3, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
FH1201 Firmware
Classifications
CWE-121, CWE-787, T1499.004
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 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\(408\)

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · FH1201 Firmwareversion=1.2.0.14\(408\)

Published CVSS scores

5.7CISA-ADPCVSS:3.1/AV:A/AC:L/PR:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
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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