Is CVE-2026-21620 actively exploited?

No active exploitation of CVE-2026-21620 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-21620 be exploited remotely?

Yes. CVE-2026-21620 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-21620?

CVE-2026-21620 has a CVSS score of 2.3 (LOW) and an EPSS exploitation probability of 0.02%.

HOME VULNERABILITIESCVE-2026-21620

LOW

CVE-2026-21620

CWE-23Published: February 20, 2026· Updated: Feb 20, 2026

2.3

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:5.5th

Official Description

Relative Path Traversal, Improper Isolation or Compartmentalization vulnerability in erlang otp erlang/otp (tftp_file modules), erlang otp inets (tftp_file modules), erlang otp tftp (tftp_file modules) allows Relative Path Traversal. This vulnerability is associated with program files lib/tftp/src/tftp_file.erl, src/tftp_file.erl.

This issue affects otp: from 17.0, from 07b8f441ca711f9812fad9e9115bab3c3aa92f79; otp: from 5.10 before 7.0; otp: from 1.0.

NVD Source

Technical Analysis

CVE-2026-21620 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X