CVE-2024-30621Public exploit

Service crash via unchecked WAN parameter copy

Published Apr 2, 2024 · Updated Aug 19, 2024

Stack-based buffer overflow in Tenda AX1803 firmware 1.0.0.1 allows remote attackers on an adjacent network to crash the router service. The WAN-settings request reaches sub_8C594, where strcpy copies a request parameter into a fixed-size stack buffer without bounds checking. Exploitation requires two crafted HTTP requests, including selection of WAN type 2; the demonstrated consequence is an availability interruption.

CVSS severity9.8
Critical
EPSS probability0.74%
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 AX1803 firmware 1.0.0.1 allows remote attackers on an adjacent network to crash the router service. The WAN-settings request reaches sub_8C594, where strcpy copies a request parameter into a fixed-size stack buffer without bounds checking. Exploitation requires two crafted HTTP requests, including selection of WAN type 2; the demonstrated consequence is an availability interruption.

The record

CVE
CVE-2024-30621
Published
Apr 2, 2024
Updated
Aug 19, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AX1803
Classifications
CWE-787, CWE-121, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=1.0.0.1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AX1803version=1.0.0.1

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-121Stack-based Buffer Overflow
T1499Endpoint Denial of Service

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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