CVE-2024-36290Public exploitNetwork attack vector

Unauthenticated code execution via unchecked wlanUrl copy

Published Jan 14, 2025 · Updated Jan 14, 2025

Stack-based buffer overflow in Wavlink AC3000 M33A8.V5030.210505 allows remote attackers to execute code via a crafted HTTP request. Goto_chidx reads the wlanUrl POST parameter and passes it to sprintf into a fixed-size stack buffer without checking its length. Network access to login.cgi is sufficient because that authentication endpoint omits the session-cookie check used by other CGI binaries, and overwriting the saved return address enables code execution.

CVSS severity10.0
Critical
EPSS probability1.41%
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 Wavlink AC3000 M33A8.V5030.210505 allows remote attackers to execute code via a crafted HTTP request. Goto_chidx reads the wlanUrl POST parameter and passes it to sprintf into a fixed-size stack buffer without checking its length. Network access to login.cgi is sufficient because that authentication endpoint omits the session-cookie check used by other CGI binaries, and overwriting the saved return address enables code execution.

The record

CVE
CVE-2024-36290
Published
Jan 14, 2025
Updated
Jan 14, 2025
Vendor
Wavlink
Product
AC3000 Tri-band Wi-Fi Router
Classifications
CWE-120, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Jan 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=M33A8.V5030.210505

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wavlink · AC3000 Tri-band Wi-Fi Routerversion=M33A8.V5030.210505

Published CVSS scores

10.0Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.8NIST NVDCVSS: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-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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