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CVE-2026-21620

Published Feb 20, 2026 CWE-23 EPSS 0.46% (38th pctl)

Overview

CVE-2026-21620 is a known-severity vulnerability. It was published on February 20, 2026.

Technical 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 OTP 17.0 before OTP 28.3.2, OTP 27.3.4.8 and OTP 26.2.5.17, corresponding to tftp from 1.0 before 1.2.4, 1.2.2.1 and 1.1.1.1; also inets from 5.10 before 7.0.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Ref cna.erlef.org/cves/CVE-2026-21620.html GitHub github.com/erlang/otp/commit/3970738f687325138eb75f798054fa8960ac354e GitHub github.com/erlang/otp/commit/655fb95725ba2fb811740b57e106873833824344 GitHub github.com/erlang/otp/commit/696fdec922661d4a3cc528fc34bc24fae8d4ad8a GitHub github.com/erlang/otp/pull/10706 GitHub github.com/erlang/otp/security/advisories/GHSA-hmrc-prh3-rpvp Ref osv.dev/vulnerability/EEF-CVE-2026-21620 Ref www.erlang.org/doc/system/versions.html#order-of-versions

Frequently Asked Questions

What is CVE-2026-21620?

CVE-2026-21620 is a known-severity vulnerability. It was published on February 20, 2026.

How severe is CVE-2026-21620?

CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.

How do I fix or remediate CVE-2026-21620?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-21620?

CyberStrike's AI-powered security agents can automatically detect CVE-2026-21620 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

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