CVE-2021-30551

ENISA EUVD: EUVD-2021-17472 ↗
Exploited in the Wild ✓ Confirmed 0-Day ★ Google Project Zero
Triaged: March 5, 2026 18 articles Published: 2021-06-15
VulnLookup ↗ NVD ↗ EUVD ↗ MITRE ↗ Advisory ↗ P0 Sheet ↗ CISA KEV ↗

EPSS Score

Source: FIRST.org · 2026-05-23
82.22%
probability
This CVE has a 82.22% probability of being exploited in the next 30 days.
0% Top 99.2th percentile of all CVEs 100%

CVSS v3.1

Source: VulnerabilityLookup (CIRCL)
8.8
HIGH
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2 (legacy)

6.8
MEDIUM
Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
AV:N/AC:M/Au:N/C:P/I:P/A:P

Description

VulnerabilityLookup (CNA)
Type confusion in V8 in Google Chrome prior to 91.0.4472.101 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Affected Products

Google
Chrome
unspecified

Attack Intelligence

Google Project Zero

Discovered
June 3, 2021
Patched
June 9, 2021
Reported by
Clement Lecigne of Google's Threat Analysis Group and Sergei Glazunov of Google Project Zero
Root Cause Analysis
https://googleprojectzero.github.io/0days-in-the-wild/0day-RCAs/2021/CVE-2021-30551.html

Exploits & PoC

xmzyshypnc/CVE-2021-30551

my exp for chrome V8 CVE-2021-30551

24 2023-04-04
1 repo — triés par ⭐ Rechercher sur GitHub ↗

Signal Intelligence

Confidenceⓘ
95%
EPSS 82.22%
CVSS v3.1 8.8
Mentions 18
Last Seen Feb 14, 2022

CNA Information

CNA Assigner
Chrome

Analyst Note

Auto-imported from Google Project Zero — confirmed zero-day by definition.

Threat Actors 1

Tortoiseshell
apt_group Information theft and espionage 🇮🇷 IR

Triage Info

Decided atMar 05, 2026
Published DateJun 15, 2021