CVE-2024-39774Public exploitNetwork attack vector

Authenticated code execution via unchecked password copy

Published Jan 14, 2025 · Updated Jan 14, 2025

Stack-based buffer overflow in Wavlink AC3000 firmware M33A8.V5030.210505 allows remote authenticated users to execute code via HTTP. The adm.cgi set_sys_adm() function passes the attacker-controlled new_pwd value to two sprintf calls that copy it into fixed-size stack buffers without length checks. A valid administrator session cookie is required; overwriting the saved return address can crash adm.cgi or execute code on the router.

CVSS severity9.1
Critical
EPSS probability1.31%
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 firmware M33A8.V5030.210505 allows remote authenticated users to execute code via HTTP. The adm.cgi set_sys_adm() function passes the attacker-controlled new_pwd value to two sprintf calls that copy it into fixed-size stack buffers without length checks. A valid administrator session cookie is required; overwriting the saved return address can crash adm.cgi or execute code on the router.

The record

CVE
CVE-2024-39774
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
admin

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 privilegesadmin

What is affected?

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

Published CVSS scores

9.1Cisco TalosCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
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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