CVE-2024-39273Public exploitNetwork attack vector

Arbitrary firmware installation via intercepted HTTP updates

Published Jan 14, 2025 · Updated Jan 15, 2025

Missing authentication in Wavlink AC3000 router firmware M33A8.V5030.210505 allows man-in-the-middle attackers to install arbitrary firmware. The scheduled sbin/fw_check.sh fetches update metadata over HTTP, trusts its supplied firmware URL and SHA-256 value, and flashes a matching download without authenticity validation. An attacker able to intercept an update check can replace the router firmware and force its reboot.

CVSS severity9.0
Critical
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Wavlink AC3000 router firmware M33A8.V5030.210505 allows man-in-the-middle attackers to install arbitrary firmware. The scheduled sbin/fw_check.sh fetches update metadata over HTTP, trusts its supplied firmware URL and SHA-256 value, and flashes a matching download without authenticity validation. An attacker able to intercept an update check can replace the router firmware and force its reboot.

The record

CVE
CVE-2024-39273
Published
Jan 14, 2025
Updated
Jan 15, 2025
Vendor
Wavlink
Product
AC3000 Tri-band Wi-Fi Router
Classifications
CWE-306, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Jan 15, 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

8.1NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.0Cisco TalosCVSS:3.1/AV:N/AC:H/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
T1557Adversary-in-the-Middle

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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