Is CVE-2026-27699 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-27699, but active exploitation has not been confirmed.

Can CVE-2026-27699 be exploited remotely?

Yes. CVE-2026-27699 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27699?

CVE-2026-27699 has a CVSS score of 9.8 (CRITICAL) and an EPSS exploitation probability of 0.04%.

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CRITICALPOC

CVE-2026-27699

CWE-22Published: February 25, 2026· Updated: Feb 26, 2026

9.8

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:17.4th

Official Description

The `basic-ftp` FTP client library for Node.js contains a path traversal vulnerability (CWE-22) in versions prior to 5.2.0 in the `downloadToDir()` method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory. Version 5.2.0 patches the issue.

NVD Source

Technical Analysis

CVE-2026-27699 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.

A proof-of-concept (PoC) exploit exists for CVE-2026-27699. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.