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VulnerabilityPublished Updated

CVE-2023-52031: RCE

Source CVE Database V5

0

Not known to be exploited · CVSS 9.8 Critical.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
1.5% chance of exploitation in 30 days – higher than 74% 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 11 Jan 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

Organizations should immediately verify if TOTOlink A3700R routers with firmware version 9.1.2u.5822_B20200513 are deployed within their environments. Network administrators should restrict remote management interfaces, especially those exposed to the internet, and implement network segmentation to isolate vulnerable devices from critical infrastructure. Employing intrusion detection/prevention systems (IDS/IPS) to monitor for anomalous firmware upload attempts or suspicious command execution patterns can provide early warning. Additionally, organizations should enforce strict access controls, disable unnecessary services on routers, and maintain up-to-date asset inventories to quickly identify and remediate vulnerable devices. Regular security audits and penetration testing focusing on network perimeter devices are also recommended to detect exploitation attempts.

Description

TOTOlink A3700R v9.1.2u.5822_B20200513 was discovered to contain a remote command execution (RCE) vulnerability via the UploadFirmwareFile function.

References

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