CVE-2024-39608Public exploitNetwork attack vector

Unauthenticated firmware replacement via exposed upload handler

Published Jan 14, 2025 · Updated Jan 14, 2025

Missing authentication in Wavlink AC3000 M33A8.V5030.210505 allows remote attackers to flash arbitrary firmware via HTTP. The upload.cgi handler writes POSTed image data to /var/tmpFW and invokes mtd_write_firmware after only U-Boot magic and CRC checks, without authenticating the requester. Network access to the router is sufficient; a successful upload rewrites device firmware and forces a reboot, enabling persistent device compromise.

CVSS severity10.0
Critical
EPSS probability1.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Missing authentication in Wavlink AC3000 M33A8.V5030.210505 allows remote attackers to flash arbitrary firmware via HTTP. The upload.cgi handler writes POSTed image data to /var/tmpFW and invokes mtd_write_firmware after only U-Boot magic and CRC checks, without authenticating the requester. Network access to the router is sufficient; a successful upload rewrites device firmware and forces a reboot, enabling persistent device compromise.

The record

CVE
CVE-2024-39608
Published
Jan 14, 2025
Updated
Jan 14, 2025
Vendor
Wavlink
Product
AC3000 Tri-band Wi-Fi Router
Classifications
CWE-306, T1495
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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-306Missing Authentication for Critical Function
T1495Firmware Corruption

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo