HIGH
Exim 4.92 through 4.92.2 allows remote code execution, a different vulnerability than CVE-2019-15846. There is a heap-based buffer overflow in string_vformat in string.c involving a long EHLO command.
http://www.openwall.com/lists/oss-security/2019/09/28/1
http://www.openwall.com/lists/oss-security/2019/09/28/2
http://www.openwall.com/lists/oss-security/2019/09/28/3
http://www.openwall.com/lists/oss-security/2019/09/28/4
https://bugs.exim.org/show_bug.cgi?id=2449
https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d13670d65f
https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.html
https://seclists.org/bugtraq/2019/Sep/60
https://security.gentoo.org/glsa/202003-47
Source: MITRE
Published: 2019-09-27
Updated: 2020-08-18
Type: CWE-120
Base Score: 7.5
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 10
Severity: HIGH
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 3.9
Severity: CRITICAL