CVE-2024-30840

Denial of service via oversized LISTEN parameter

Published Apr 15, 2024 · Updated Aug 15, 2024

Stack-based buffer overflow in Tenda AC15 15.03.05.18 allows attackers on an adjacent network to cause denial of service via LISTEN. The public record identifies the fromDhcpListClient handler and its attacker-controlled LISTEN parameter but does not disclose the exact memory-copy operation that overruns the stack. Exploitation requires no privileges or user interaction, and published evidence does not distinguish a handler crash from a router reboot.

CVSS severity6.5
Medium
EPSS probability0.30%
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 AC15 15.03.05.18 allows attackers on an adjacent network to cause denial of service via LISTEN. The public record identifies the fromDhcpListClient handler and its attacker-controlled LISTEN parameter but does not disclose the exact memory-copy operation that overruns the stack. Exploitation requires no privileges or user interaction, and published evidence does not distinguish a handler crash from a router reboot.

The record

CVE
CVE-2024-30840
Published
Apr 15, 2024
Updated
Aug 15, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC15
Classifications
CWE-121, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 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=15.03.05.18

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC15version=15.03.05.18

Published CVSS scores

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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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