CVE-2020-1939

Name: CVE-2020-1939
Creator: NVD / NIST
Published: 2020-05-12T15:15:12.533+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.50%

Last modified Jun 17, 2026

CVE-2020-1939 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The Apache NuttX (Incubating) project provides an optional separate "apps" repository which contains various optional components and example programs. One of these, ftpd, had a NULL pointer dereference bug. EPSS estimates a 2.50% chance of exploitation in the next 30 days.

Description

The Apache NuttX (Incubating) project provides an optional separate "apps" repository which contains various optional components and example programs. One of these, ftpd, had a NULL pointer dereference bug. The NuttX RTOS itself is not affected. Users of the optional apps repository are affected only if they have enabled ftpd. Versions 6.15 to 8.2 are affected.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.50%

82.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Apache	Nuttx	>= 6.15, <= 8.2

References

https://lists.apache.org/thread.html/re3adc65ff4d8d9c34e5bccba3941a28cbb0a47191c150df2727e101d%40%3Cdev.nuttx.apache.org%3EMailing List, Patch, Third Party Advisory
https://lists.apache.org/thread.html/re3adc65ff4d8d9c34e5bccba3941a28cbb0a47191c150df2727e101d%40%3Cdev.nuttx.apache.org%3EMailing List, Patch, Third Party Advisory

Timeline

Published: May 12, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-1939?

How severe is CVE-2020-1939?

CVE-2020-1939 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.50% probability of exploitation in the next 30 days.

How do I fix CVE-2020-1939?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-1939?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST