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VulnerabilityPublished Updated

CVE-2024-31809: Special Element Injection

Source CVE Database V5

0

Not known to be exploited · CVSS 8.8 High.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.9% chance of exploitation in 30 days – higher than 61% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Apr 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 26 Oct 2026.

What to do

AI-suggested

Until an official patch or firmware update is released by TOTOLINK, organizations should implement several specific mitigations to reduce risk. First, restrict remote management access to the router by disabling WAN-side administration interfaces or limiting access to trusted IP addresses only. Second, monitor network traffic for unusual or unauthorized requests targeting the firmware upgrade functionality, especially those manipulating the FileName parameter. Third, segment networks to isolate vulnerable routers from critical assets and sensitive data, minimizing potential lateral movement. Fourth, consider replacing affected devices with models from vendors with timely security updates if mitigation is not feasible. Additionally, maintain up-to-date inventory of network devices to identify and prioritize vulnerable units. Once a patch is available, apply it promptly following vendor guidance. Employing intrusion detection systems (IDS) or endpoint detection and response (EDR) solutions capable of recognizing exploitation attempts can further enhance defense. Finally, educate users and administrators about the risks associated with router vulnerabilities and the importance of secure configuration.

Description

TOTOLINK EX200 V4.0.3c.7646_B20201211 was discovered to contain a remote code execution (RCE) vulnerability via the FileName parameter in the setUpgradeFW function.

References

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