CVE-2026-15410: SonicWall SMA6210 Firmware RCE Vulnerability

CVE-2026-15410 Overview

CVE-2026-15410 is a post-authentication code injection vulnerability [CWE-94] in the SonicWall SMA1000 Appliance Management Console (AMC). Under specific conditions, a remote authenticated attacker with administrator privileges can execute arbitrary operating system commands on the underlying appliance. The flaw affects SonicWall SMA6210, SMA7210, and SMA8200v firmware versions across the 12.4.3 and 12.5.0 release trains. CISA has added CVE-2026-15410 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active abuse in the wild.

Critical Impact
Authenticated administrators can execute arbitrary OS commands on SMA1000 appliances, resulting in full compromise of confidentiality, integrity, and availability of the affected gateway.

Affected Products

SonicWall SMA6210 firmware versions 12.4.3-03245, 12.4.3-03387, 12.4.3-03434, 12.5.0-02283, 12.5.0-02624, and 12.5.0-02800
SonicWall SMA7210 firmware versions 12.4.3-03245, 12.4.3-03387, 12.4.3-03434, 12.5.0-02283, 12.5.0-02624, and 12.5.0-02800
SonicWall SMA8200v virtual appliance across the same 12.4.3 and 12.5.0 firmware builds

Discovery Timeline

2026-07-14 - CVE-2026-15410 published to the National Vulnerability Database
2026-07-16 - Last updated in NVD database
2026-07-20 - EPSS score updated to 1.486% (71.182 percentile)

Technical Details for CVE-2026-15410

Vulnerability Analysis

The vulnerability resides in the SMA1000 Appliance Management Console, the web-based administrative interface used to configure the Secure Mobile Access gateway. Improper control over the generation of code allows attacker-supplied input to be interpreted as executable code by the underlying operating system. Successful exploitation grants command execution in the context of the AMC process, typically running with elevated privileges on the appliance.

Although exploitation requires prior authentication as an administrator, CISA has listed CVE-2026-15410 as known-exploited. Attackers commonly pair such issues with credential theft, phishing of administrators, or chained authentication weaknesses to reach the vulnerable endpoint.

Root Cause

The root cause is improper neutralization of directives passed to a downstream code interpreter, categorized under [CWE-94] Improper Control of Generation of Code. AMC accepts administrator-supplied parameters and incorporates them into a command or script construct without adequate validation or sanitization. When the constructed payload is passed to the operating system, injected metacharacters or code fragments execute alongside the intended command.

Attack Vector

The attack vector is remote over the network. An attacker authenticates to the SMA1000 AMC as an administrator, then submits crafted input to a vulnerable configuration or management function. The malicious payload is embedded in an OS command constructed by the appliance and executed on the underlying host, yielding arbitrary command execution.

SonicWall has not publicly released the specific affected parameter or endpoint. Refer to the SonicWall Security Advisory SNWLID-2026-0008 for vendor-supplied technical details.

Detection Methods for CVE-2026-15410

Indicators of Compromise

Unexpected child processes spawned by SMA1000 AMC service accounts, especially shells (/bin/sh, /bin/bash) or interpreters (python, perl) launched from web management components
Outbound network connections from the SMA appliance to unrecognized IP addresses, particularly following administrator login events
New or modified files in AMC working directories, cron entries, or startup scripts that were not deployed through vendor update processes
Administrator login sessions from atypical source IP addresses, unusual geographies, or outside normal maintenance windows

Detection Strategies

Review AMC audit logs for administrator sessions correlated with configuration changes on endpoints associated with command construction
Alert on process-lineage anomalies where the AMC web process spawns operating system utilities such as sh, curl, wget, or nc
Ingest SMA1000 syslog and authentication events into a centralized log platform and baseline normal administrator activity to surface deviations
Monitor for repeated failed administrator authentication attempts preceding successful logins, indicating credential guessing prior to exploitation

Monitoring Recommendations

Enable verbose audit logging on the SMA1000 AMC and forward all events to a SIEM or data lake for retention and correlation
Track outbound traffic from the appliance management interface and flag connections to non-corporate destinations
Continuously verify the integrity of appliance binaries and configuration files against known-good hashes provided by SonicWall
Correlate CISA KEV catalog entries with active exposure scans of internet-facing SMA1000 devices to prioritize response

How to Mitigate CVE-2026-15410

Immediate Actions Required

Apply the fixed firmware released by SonicWall for SMA6210, SMA7210, and SMA8200v as documented in SNWLID-2026-0008
Restrict access to the AMC management interface to a dedicated administrative network or bastion host and remove any exposure to the public internet
Rotate all administrator credentials and API tokens used with the SMA1000 appliance following patch deployment
Review AMC audit logs and appliance filesystem for signs of prior exploitation given the CISA KEV listing

Patch Information

SonicWall has published fixed firmware and remediation guidance in SonicWall Security Advisory SNWLID-2026-0008. Administrators should upgrade all affected SMA6210, SMA7210, and SMA8200v deployments to the versions listed in the advisory. CVE-2026-15410 is tracked in the CISA Known Exploited Vulnerabilities Catalog, and federal agencies must remediate within the mandated timeframe.

Workarounds

Enforce multi-factor authentication for every administrator account that can access the AMC to raise the bar against credential-based access
Apply network access control lists that permit AMC traffic only from designated management jump hosts
Disable or remove unused administrator accounts and audit role assignments to minimize the privileged attack surface
Monitor the appliance closely and be prepared to isolate it from the network if suspicious activity is observed prior to patching

bash

# Example: restrict AMC access with a host-based firewall rule
# Replace <MGMT_SUBNET> with your administrative network CIDR
iptables -A INPUT -p tcp --dport 8443 -s <MGMT_SUBNET> -j ACCEPT
iptables -A INPUT -p tcp --dport 8443 -j DROP