Is CVE-2023-31856 actively exploited?

No active exploitation of CVE-2023-31856 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-31856 be exploited remotely?

Yes. CVE-2023-31856 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-31856?

CVE-2023-31856 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-31856

CWE-77Published: May 16, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A command injection vulnerability in the hostTime parameter in the function NTPSyncWithHostof TOTOLINK CP300+ V5.2cu.7594_B20200910 allows attackers to execute arbitrary commands via a crafted http packet.

NVD Source

Risk Analysis

TOTOLINK CP300+ firmware contains a command injection vulnerability in the hostTime parameter. This allows remote, unauthenticated attackers to execute arbitrary system commands via crafted HTTP packets.

No public exploit is currently known, and it is not in the CISA KEV. The flaw is remotely exploitable with low attack complexity.

Recommended Action

Update the device firmware to a version that patches this command injection vulnerability. Disable remote management interfaces if not required.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-31856 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.