CVE-2020-6835

Name: CVE-2020-6835
Creator: NVD / NIST
Published: 2020-01-10T21:15:12.123+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.02%

Last modified Jun 17, 2026

CVE-2020-6835 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in Bftpd before 5.4. There is a heap-based off-by-one error during file-transfer error checking.. EPSS estimates a 2.02% chance of exploitation in the next 30 days.

Description

An issue was discovered in Bftpd before 5.4. There is a heap-based off-by-one error during file-transfer error checking.

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

2.02%

78.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-193

Affected Software

Vendor	Product	Versions
Bftpd Project	Bftpd	< 5.4

References

http://bftpd.sourceforge.net/news.html#302460Third Party Advisory
https://fossies.org/linux/bftpd/CHANGELOGRelease Notes, Third Party Advisory
http://bftpd.sourceforge.net/news.html#302460Third Party Advisory
https://fossies.org/linux/bftpd/CHANGELOGRelease Notes, Third Party Advisory

Timeline

Published: Jan 10, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-6835?

An issue was discovered in Bftpd before 5.4. There is a heap-based off-by-one error during file-transfer error checking.

How severe is CVE-2020-6835?

CVE-2020-6835 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.02% probability of exploitation in the next 30 days.

How do I fix CVE-2020-6835?

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-2020-6835?

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

Scan your code now

Source: NVD / NIST