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CVE-2024-42520VulnerabilityPublished Updated

CVE-2024-42520: n/a

Source CVE Database V5

0

Not known to be exploited · CVSS 9.8 Critical.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Aug 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

AI-suggested

Given the lack of an official patch, organizations should implement several specific mitigations: 1) Immediately isolate affected TOTOLINK A3002R devices from untrusted networks, especially the internet, to reduce exposure. 2) Employ network segmentation to limit access to vulnerable devices only to trusted management networks. 3) Use firewall rules to block inbound traffic targeting the router’s web management interface or the specific vulnerable endpoint (/bin/boa). 4) Monitor network traffic for unusual patterns or attempts to exploit the formParentControl parameter. 5) Consider replacing or upgrading affected devices with models from vendors that provide timely security updates. 6) Engage with TOTOLINK support channels to obtain any beta or unofficial patches or firmware updates. 7) Implement intrusion detection/prevention systems (IDS/IPS) with signatures targeting this vulnerability once available. 8) Conduct regular vulnerability assessments and penetration tests focusing on network infrastructure devices. These steps go beyond generic advice by focusing on network-level controls and device replacement strategies to mitigate risk until a patch is available.

Description

TOTOLINK A3002R v4.0.0-B20230531.1404 contains a buffer overflow vulnerability in /bin/boa via formParentControl.

References

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