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Vulnerability details: VCID-16cw-k8f1-8kc4
Vulnerability ID VCID-16cw-k8f1-8kc4
Aliases CVE-2021-38499
Summary Mozilla developers and community members Julien Cristau, Christian Holler reported memory safety bugs present in Firefox 92. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (0)
There are no known CWE.
System Score Found at
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
epss 0.0042 https://api.first.org/data/v1/epss?cve=CVE-2021-38499
archlinux High https://security.archlinux.org/AVG-2443
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-43
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-38499
AVG-2443 https://security.archlinux.org/AVG-2443
mfsa2021-43 https://www.mozilla.org/en-US/security/advisories/mfsa2021-43
USN-5107-1 https://usn.ubuntu.com/5107-1/
No exploits are available.
Exploit Prediction Scoring System (EPSS)
Percentile 0.61816
EPSS Score 0.0042
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:17:12.900636+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2021/mfsa2021-43.yml 38.0.0