CVE-2021-21017
Exploited in the Wild
✓ Confirmed 0-Day
★ Google Project Zero
Triaged: March 5, 2026
4 articles
EPSS Score
Source: FIRST.org · 2026-05-24
90.2%
probability
This CVE has a 90.2% probability
of being exploited in the next 30 days.
0%
Top 99.6th percentile of all CVEs
100%
CVSS score unavailable
Neither CIRCL nor NVD returned a CVSS score for this CVE.
View on VulnerabilityLookup ↗
Description
Project ZeroHeap-based buffer overflow
Attack Intelligence
Google Project Zero
Patched
Feb. 9, 2021
Reported by
???
Root Cause Analysis
???
Exploits & PoC
ZeusBox/CVE-2021-21017
PoC CVE-2021-21017 — ZeusBox/CVE-2021-21017
44
1 repo — triés par ⭐
Rechercher sur GitHub ↗
Adobe fixes critical Reader vulnerability exploited in the wild
BleepingComputer
Feb 09, 2021
February 2021 Patch Tuesday – 56 Vulnerabilities, 11 Critical, Adobe
Qualys
Feb 09, 2021
Qualys Response to CISA Alert: Binding Operational Directive 22-01
Qualys
Nov 09, 2021
Signal Intelligence
Confidence
95%
EPSS
90.2%
Mentions
4
Last Seen
Nov 09, 2021
CNA Information
Analyst Note
Auto-imported from Google Project Zero — confirmed zero-day by definition.
Triage Info
Decided atMar 05, 2026