CVE-2024-50854Public exploitNetwork attack vector

Authenticated memory corruption via unbounded sprintf

Published Nov 13, 2024 · Updated Mar 14, 2025

Stack overflow in the G3 web interface in Tenda G3 3.0 firmware 15.11.0.20 allows remote authenticated users to corrupt process memory. The formSetPortMapping handler passes the user-controlled portMappingServer, portMappingProtocol, and portMappingWan values to sprintf without a length limit. A valid login is required to post to /goform/setPortMapping, and the published proof of concept establishes memory corruption but not code execution.

CVSS severity8.8
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 overflow in the G3 web interface in Tenda G3 3.0 firmware 15.11.0.20 allows remote authenticated users to corrupt process memory. The formSetPortMapping handler passes the user-controlled portMappingServer, portMappingProtocol, and portMappingWan values to sprintf without a length limit. A valid login is required to post to /goform/setPortMapping, and the published proof of concept establishes memory corruption but not code execution.

The record

CVE
CVE-2024-50854
Published
Nov 13, 2024
Updated
Mar 14, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
G3 QoS VPN Router
Classifications
CWE-787, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 14, 2025Record 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=v15.11.0.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · G3 QoS VPN Routerversion=v15.11.0.20

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1190Exploit Public-Facing Application

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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