CVE-2020-21686 is a stack-use-after-scope vulnerability found in the expand_mmac_params function within preproc.c of NASM (Netwide Assembler) versions prior to 2.15.04. This flaw allows a remote attacker to trigger a denial of service by providing a specially crafted assembly file. Rated Medium with a CVSS score of 5.5, the vulnerability requires user interaction (UI:R) and local access (AV:L) to exploit, leading to high availability impact (A:H). There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2.15.04CPE matchmatch criteria | cpe:2.3:a:nasm:netwide_assembler:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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