CVE-2021-20016 CISA KEV · Actively exploitedLinked to ransomwareSuited to automated attack · CISA

SQL injection in SonicWall SMA100

CVSS score

9.8

EPSS probability

%40.0

Risk score

7.8

Published

5 y ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Mitigation available

Apply updates per vendor instructions.

Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2021-20016 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2021-20016 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	sonicwall	SonicWall SMA100	View
2	sonicwall	sma 100 firmware	View
3	sonicwall	sma 100	View
4	sonicwall	sma 200 firmware	View
5	sonicwall	sma 200	View
6	sonicwall	sma 210 firmware	View
7	sonicwall	sma 210	View
8	sonicwall	sma 400 firmware	View
9	sonicwall	sma 400	View
10	sonicwall	sma 410 firmware	View
11	sonicwall	sma 410	View
12	sonicwall	sma 500v	View

Total affected vendors: 1|Products: 12

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
9.8	CVSS V3_1	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CVE ADP
9.8	CVSS V31	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD
7.5	CVSS V2	—	AV:N/AC:L/Au:N/C:P/I:P/A:P	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Workaround

Resmî yama doğrulanamadı; geçici azaltım veya workaround mevcut.

canonical

Apply updates per vendor instructions.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

This CVE is marked as actively exploited in the CISA KEV catalogue, but no verified, downloadable public PoC or Metasploit module has been found yet. Evidence of active exploitation does not mean that public exploit code exists.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-20016 is associated with the following CWEs:

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-20016 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0001vendor-advisory https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20016nvd CISA Known Exploited Vulnerabilities Catalogkev

CVSS Vector Radar Chart

9.8 / 10

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)High

Geçici çözüm

Resmî yama doğrulanamadı; geçici azaltım veya workaround mevcut.

Follow the vendor

sonicwall

Weakness Type (CWE & CAPEC)

CWE-89

Similar Vulnerabilities

10.0

CVE-2021-44228 Actively exploited

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