Is CVE-2026-5020 actively exploited?

No active exploitation of CVE-2026-5020 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-5020 be exploited remotely?

Yes. CVE-2026-5020 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5020?

CVE-2026-5020 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-5020

CWE-74Published: March 29, 2026· Updated: Mar 30, 2026

9.8

CVSS v3.1

EPSS:1.17%probability of exploitation in 30 daysPercentile:78.6th

Official Description

A vulnerability was detected in Totolink A3600R 4.1.2cu.5182_B20201102. Affected by this issue is the function setNoticeCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. The manipulation of the argument NoticeUrl results in command injection. The attack may be launched remotely. The exploit is now public and may be used.

NVD Source

Technical Analysis

CVE-2026-5020 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.