CVE-2019-12953

Name: CVE-2019-12953
Creator: NVD / NIST
Published: 2020-12-30T20:15:14.797+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.18%

Last modified Jun 17, 2026

CVE-2019-12953 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Dropbear 2011.54 through 2018.76 has an inconsistent failure delay that may lead to revealing valid usernames, a different issue than CVE-2018-15599.. EPSS estimates a 1.18% chance of exploitation in the next 30 days.

Description

Dropbear 2011.54 through 2018.76 has an inconsistent failure delay that may lead to revealing valid usernames, a different issue than CVE-2018-15599.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.18%

63.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-203

Affected Software

Vendor	Product	Versions
Dropbear Ssh Project	Dropbear Ssh	>= 2011.54, <= 2018.76

References

https://matt.ucc.asn.au/dropbear/CHANGESRelease Notes, Third Party Advisory
https://matt.ucc.asn.au/dropbear/CHANGESRelease Notes, Third Party Advisory

Timeline

Published: Dec 30, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-12953?

Dropbear 2011.54 through 2018.76 has an inconsistent failure delay that may lead to revealing valid usernames, a different issue than CVE-2018-15599.

How severe is CVE-2019-12953?

CVE-2019-12953 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.

How do I fix CVE-2019-12953?

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-2019-12953?

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

Scan your code now

Source: NVD / NIST