Page generated: 09 Nov 2026, 05:44 UTC
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CVE-2021-20016

A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a remote unauthenticated attacker to perform SQL query to access username password and other session related information. This vulnerability impacts SMA100 build version 10.x.

CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.7/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 40.04%: +0.20

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

Sources: 11 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

CyberScoop
Press · 05 Aug 2025, 07:00 · SonicWall firewalls hit by active mass exploitation of suspected zero-day - CyberScoop
Cybersecurity Dive
Press · 28 Jan 2025, 08:00 · SonicWall SMA 1000 series appliances left exposed on the internet - Cybersecurity Dive
Cybersecurity Dive
Press · 27 Jan 2025, 08:00 · SonicWall warns hackers targeting critical vulnerability in SMA 1000 series appliances - Cybersecurity Dive
The Record from Recorded Future News
Press · 08 Nov 2023, 08:00 · NY AG issues $450k penalty to US Radiology after unpatched bug led to ransomware attack - The Record from Recorded Future News
ET CIO
Press · 28 Jan 2022, 08:00 · Hackers are Increasingly Targeting Zero-Day Vulnerabilities and Supply Chain Networks for Maximum Impact, st.. - ET CIO
See all 11 source documents
SECURITY.COM
Press · 19 Jan 2022, 08:00 · The Threat Landscape in 2021 - SECURITY.COM
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
BleepingComputer
Press · 24 Sep 2021, 07:00 · SonicWall fixes critical bug allowing SMA 100 device takeover - BleepingComputer
Unit 42
Press · 06 Jul 2021, 07:00 · Understanding REvil: REvil Threat Actors May Have Returned (Updated) - Unit 42
CrowdStrike
Press · 08 Jun 2021, 07:00 · How eCrime Groups Leverage an Old SonicWall Vulnerability - CrowdStrike

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 8.7 (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 9.8; EPSS 40.0%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior 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
03 Feb 2021, 20:35
First press mention
08 Jun 2021, 07:00
Added to the CISA KEV catalog
03 Nov 2021, 00:00
Latest press mention
05 Aug 2025, 07:00
Score calculated
05 Nov 2026, 13:58