CVE-2024-51116Public exploit

Code execution via unbounded startIp stack copy

Published Nov 5, 2024 · Updated Nov 6, 2024

Buffer overflow in Tenda AC6 v2.0 15.03.06.50 allows remote attackers to execute code via a crafted PPTP startIp value. The formSetPPTPServer handler passes startIp to sscanf without a length bound, overflowing a stack buffer. CISA assesses no privileges or user interaction, but reachability is limited to an adjacent network and exploitation can also crash the router.

CVSS severity8.8
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Tenda AC6 v2.0 15.03.06.50 allows remote attackers to execute code via a crafted PPTP startIp value. The formSetPPTPServer handler passes startIp to sscanf without a length bound, overflowing a stack buffer. CISA assesses no privileges or user interaction, but reachability is limited to an adjacent network and exploitation can also crash the router.

The record

CVE
CVE-2024-51116
Published
Nov 5, 2024
Updated
Nov 6, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC6
Classifications
CWE-120, T1190
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 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=15.03.06.50

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC6version=15.03.06.50

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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