Is CVE-2018-5261 actively exploited?

No active exploitation of CVE-2018-5261 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-5261 be exploited remotely?

Yes. CVE-2018-5261 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-5261?

CVE-2018-5261 has a CVSS score of 8.1 (HIGH).

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HIGH

CVE-2018-5261

CWE-311Published: February 2, 2018· Updated: Jun 17, 2026

8.1

CVSS v3.1

Official Description

An issue was discovered in Flexense DiskBoss 8.8.16 and earlier. Due to the usage of plaintext information from the handshake as input for the encryption key used for the encryption of the rest of the session, the server and client disclose sensitive information, such as the authentication credentials, to any man-in-the-middle (MiTM) listener.

NVD Source

Technical Analysis

CVE-2018-5261 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 8.1.