What’s Vulnerable › Vulnerabilities
CVE-2020-21686
- Severity: medium (CVSS 5.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2023-08-22 · updated 2026-06-17
- Weakness: CWE-562
Description
A stack-use-after-scope issue discovered in expand_mmac_params function in preproc.c in nasm before 2.15.04 allows remote attackers to cause a denial of service via crafted asm file.
Affected products
- NASM Netwide Assember: before 2.15.04 — fixed in 2.15.04
How to fix
Upgrade to a fixed version: NASM Netwide Assember 2.15.04. Check the vendor advisory for mitigations.
References
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