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Sma 100 Firmware CVE-2019-7482

CRITICAL
Stack-based Buffer Overflow (CWE-121)
2019-12-19 PSIRT@sonicwall.com
9.8
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Stack buffer bounds checking
MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 8.8% exploitation probability (EPSS)

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AnalysisAI

Stack-based buffer overflow in SonicWall SMA100 allows an unauthenticated user to execute arbitrary code in function libSys.so. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-121. Stack-based buffer overflow in SonicWall SMA100 allows an unauthenticated user to execute arbitrary code in function libSys.so. This vulnerability impacted SMA100 version 9.0.0.3 and earlier. Affected products include: Sonicwall Sma 100 Firmware. Version information: version 9.0.0.3.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

Stack-based buffer overflow in SonicWall SMA100 allows an unauthenticated user to execute arbitrary code in function libSys.so. This vulnerability impacted SMA100 version 9.0.0.3 and earlier.

Threat Intelligence Overview

EPSS Score
8.8%
Top 5% exploitable
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 8.8%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

58
Low Medium High Critical
KEV: 0
EPSS: +9
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

A stack-based buffer overflow occurs when a program writes more data to a buffer located on the stack than it was allocated to hold.

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:o:sonicwall:sma_100_firmware:*:*:*:*:*:*:*:*
CVE-2019-7481 HIGH POC
7.5 Dec 17

Vulnerability in SonicWall SMA100 allow unauthenticated user to gain read-only access to unauthorized resources. Rated h

CVE-2021-20016 CRITICAL
9.8 Feb 04

A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a remote unauthenticated attacker to perform

CVE-2025-32819 HIGH POC
8.8 May 07

A vulnerability in SMA100 allows a remote authenticated attacker with SSLVPN user privileges to bypass the path traversa

CVE-2025-32820 HIGH
8.8 May 07

A vulnerability in SMA100 allows a remote authenticated attacker with SSLVPN user privileges can inject a path traversal

CVE-2019-7486 HIGH
8.8 Dec 19

Code injection in SonicWall SMA100 allows an authenticated user to execute arbitrary code in viewcacert CGI script. Rate

CVE-2019-7485 HIGH
8.8 Dec 19

Buffer overflow in SonicWall SMA100 allows an authenticated user to execute arbitrary code in DEARegister CGI script. Ra

CVE-2021-20050 HIGH
7.5 Dec 23

An Improper Access Control Vulnerability in the SMA100 series leads to multiple restricted management APIs being accessi

CVE-2021-20049 HIGH
7.5 Dec 23

A vulnerability in SonicWall SMA100 password change API allows a remote unauthenticated attacker to perform SMA100 usern

CVE-2019-7483 HIGH
7.5 Dec 19

In SonicWall SMA100, an unauthenticated Directory Traversal vulnerability in the handleWAFRedirect CGI allows the user t

CVE-2025-32821 HIGH
7.2 May 07

A vulnerability in SMA100 allows a remote authenticated attacker with SSLVPN admin privileges can with admin privileges

CVE-2019-7484 MEDIUM
6.5 Dec 19

Authenticated SQL Injection in SonicWall SMA100 allow user to gain read-only access to unauthorized resources using view

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