Page generated: 11 Nov 2026, 12:09 UTC
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CVE-2021-20035

Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user which potentially leads to DoS.

CVSS 6.5 (MEDIUM) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.0/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 6.5: +0.97
  • Fresh EPSS: 4.41%: +0.02

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

Sources: 10 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

Halcyon.AI
Press · 27 Jul 2026, 07:00 · World Leaks - Halcyon.AI
SecurityWeek
Press · 24 Sep 2025, 07:00 · SonicWall Updates SMA 100 Appliances to Remove Overstep Malware - SecurityWeek
BleepingComputer
Press · 24 Jul 2025, 07:00 · SonicWall urges admins to patch critical RCE flaw in SMA 100 devices - BleepingComputer
The Hacker News
Press · 16 Jul 2025, 07:00 · UNC6148 Backdoors Fully-Patched SonicWall SMA 100 Series Devices with OVERSTEP Rootkit - The Hacker News
CyberScoop
Press · 16 Jul 2025, 07:00 · SonicWall customers hit by fresh, ongoing attacks targeting fully patched SMA 100 devices - CyberScoop
See all 10 source documents
Help Net Security
Press · 16 Jul 2025, 07:00 · SonicWall SMA devices persistently infected with stealthy OVERSTEP backdoor and rootkit - Help Net Security
The Hacker News
Press · 01 May 2025, 07:00 · SonicWall Confirms Active Exploitation of Flaws Affecting Multiple Appliance Models - The Hacker News
BleepingComputer
Press · 18 Apr 2025, 07:00 · SonicWall SMA VPN devices targeted in attacks since January - BleepingComputer
Cybersecurity Dive
Press · 17 Apr 2025, 07:00 · Older SonicWall SMA100 vulnerability exploited in the wild - Cybersecurity Dive
SecurityWeek
Press · 09 Jan 2025, 08:00 · SonicWall Patches Authentication Bypass Vulnerabilities in Firewalls - SecurityWeek

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 8.0 (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 6.5; EPSS 4.4%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, low 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
27 Sep 2021, 17:20
First press mention
09 Jan 2025, 08:00
Added to the CISA KEV catalog
16 Apr 2025, 00:00
Latest press mention
27 Jul 2026, 07:00
Score calculated
05 Nov 2026, 13:58