CVE-2024-28553Public exploitNetwork attack vector

Unauthenticated service crash via unbounded sprintf

Published Mar 12, 2024 · Updated Aug 28, 2024

Stack overflow in Tenda AC18 Firmware 15.03.05.05 allows remote attackers to crash the web service via a crafted POST request. The fromAddressNat function passes the POST entrys value directly to sprintf into a stack buffer, allowing it to overwrite the return address. No authentication or user interaction is required; a sufficiently long value corrupts control flow and interrupts the router's web service.

CVSS severity9.8
Critical
EPSS probability0.78%
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 Tenda AC18 Firmware 15.03.05.05 allows remote attackers to crash the web service via a crafted POST request. The fromAddressNat function passes the POST entrys value directly to sprintf into a stack buffer, allowing it to overwrite the return address. No authentication or user interaction is required; a sufficiently long value corrupts control flow and interrupts the router's web service.

The record

CVE
CVE-2024-28553
Published
Mar 12, 2024
Updated
Aug 28, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC18 Firmware
Classifications
CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=15.03.05.05

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC18 Firmwareversion=15.03.05.05

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NVDCVSS:3.1/AV:N/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)
Vectornetwork
Privilegesunauthenticated
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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