CVE-2021-4102
Exploited in the Wild
✓ Confirmed 0-Day
★ Google Project Zero
Triaged: March 5, 2026
3 articles
EPSS Score
Source: FIRST.org · 2026-05-24
5.46%
probability
This CVE has a 5.46% probability
of being exploited in the next 30 days.
0%
Top 90.3th percentile of all CVEs
100%
CVSS score unavailable
Neither CIRCL nor NVD returned a CVSS score for this CVE.
View on VulnerabilityLookup ↗
Description
Project ZeroUse-after-free in V8
Attack Intelligence
CWE-118
· Incorrect Access of Indexable Resource ('Range Error')
CWE-119
· Buffer Overflow
CWE-416
· Use After Free
CWE-664
· Improper Control of a Resource Through its Lifetime
CWE-666
· Operation on Resource in Wrong Phase of Lifetime
CWE-672
· Operation on a Resource after Expiration or Release
CWE-825
· Expired Pointer Dereference
Google Project Zero
Discovered
Dec. 9, 2021
Patched
Dec. 13, 2021
Reported by
???
Root Cause Analysis
https://googleprojectzero.github.io/0days-in-the-wild//0day-RCAs/2021/CVE-2021-4102.html
Google pushes emergency Chrome update to fix zero-day used in attacks
BleepingComputer
Dec 13, 2021
Google Chrome emergency update fixes zero-day exploited in attacks
BleepingComputer
Feb 14, 2022
Signal Intelligence
Confidence
95%
EPSS
5.46%
Mentions
3
Last Seen
Feb 14, 2022
CNA Information
Analyst Note
Auto-imported from Google Project Zero — confirmed zero-day by definition.
Triage Info
Decided atMar 05, 2026