An issue was discovered in NeoMutt before 2018-07-16. nntp_add_group in newsrc.c has a stack-based buffer overflow because of incorrect sscanf usage.
https://github.com/neomutt/neomutt/commit/6296f7153f0c9d5e5cd3aaf08f9731e56621bdd3
https://lists.debian.org/debian-lts-announce/2018/08/msg00001.html
Source: MITRE
Published: 2018-07-17
Updated: 2020-05-19
Type: CWE-787
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