CVE-2020-28019

Name: CVE-2020-28019
Creator: NVD / NIST
Published: 2021-05-06T13:15:09.587+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 61.06%

Last modified Jun 17, 2026

CVE-2020-28019 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Exim 4 before 4.94.2 has Improper Initialization that can lead to recursion-based stack consumption or other consequences. This occurs because use of certain getc functions is mishandled when a client uses BDAT instead of DATA.. EPSS estimates a 61.06% chance of exploitation in the next 30 days.

Description

Exim 4 before 4.94.2 has Improper Initialization that can lead to recursion-based stack consumption or other consequences. This occurs because use of certain getc functions is mishandled when a client uses BDAT instead of DATA.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

61.06%

99.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-665

Affected Software

Vendor	Product	Versions
Exim	Exim	>= 4.88, < 4.94.2

References

https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28019-BDATA.txtVendor Advisory
https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28019-BDATA.txtVendor Advisory

Timeline

Published: May 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28019?

How severe is CVE-2020-28019?

CVE-2020-28019 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 61.06% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28019?

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-2020-28019?

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

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Source: NVD / NIST