Page generated: 11 Nov 2026, 04:45 UTC
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CVE-2021-20022

SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to upload an arbitrary file to the remote host.

CVSS 7.2 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.2/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 7.2: +1.08
  • Fresh EPSS: 16.64%: +0.08

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 6 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Google Cloud
Press · 18 Jul 2023, 07:00 · Stealth Mode: Chinese Cyber Espionage Actors Continue to Evolve Tactics to Avoid Detection - Google Cloud
Security Affairs
Press · 15 Dec 2021, 08:00 · FBI’s investigation accidentally revealed the HelloKitty ransomware gang operates out of Ukraine - Security Affairs
BleepingComputer
Press · 01 Nov 2021, 07:00 · FBI: HelloKitty ransomware adds DDoS attacks to extortion tactics - BleepingComputer
Check Point Research
Press · 26 Apr 2021, 07:00 · 26th April – Threat Intelligence Report - Check Point Research
TechTarget
Press · 21 Apr 2021, 07:00 · Hackers exploit 3 SonicWall zero-day vulnerabilities - TechTarget
See all 6 source documents
Google Cloud
Press · 20 Apr 2021, 07:00 · Zero-Day Exploits in SonicWall Email Security Lead to Enterprise Compromise | Mandiant - Google Cloud

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.2 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 7.2; EPSS 16.6%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, high privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:22.744333+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
09 Apr 2021, 17:50
First press mention
20 Apr 2021, 07:00
Added to the CISA KEV catalog
03 Nov 2021, 00:00
Latest press mention
18 Jul 2023, 07:00
Score calculated
05 Nov 2026, 13:58