Is CVE-2022-37840 actively exploited?

No active exploitation of CVE-2022-37840 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-37840 be exploited remotely?

Yes. CVE-2022-37840 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-37840?

CVE-2022-37840 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2022-37840

CWE-120Published: September 6, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

In TOTOLINK A860R V4.1.2cu.5182_B20201027, the main function in downloadfile.cgi has a buffer overflow vulnerability.

NVD Source

Risk Analysis

A buffer overflow vulnerability exists in the main function of downloadfile.cgi in the TOTOLINK A860R. This flaw allows remote attackers to trigger a crash or execute arbitrary code.

There is no public exploit known for this issue, and it is not tracked in the CISA KEV database.

Recommended Action

Update the device firmware to the latest version to patch the buffer overflow.

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-2022-37840 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.