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CISA Adds SonicWall SMA1000 Vulnerabilities to KEV Catalog Following Active Exploitation

CVE-2026-15409

Security researchers have identified two critical vulnerabilities, CVE-2026-15409 and CVE-2026-15410, affecting SonicWall SMA1000 Series appliances. The flaws are already being exploited in the wild, prompting urgent warnings from SonicWall and CISA. Successful exploitation could result in Remote Code Execution, bypass of security restrictions, and broader compromise of affected systems.  The vulnerabilities impact SonicWall SMA1000 models 6210, 7210, and 8200v running versions 12.4.3-03245, 12.4.3-03387, 12.4.3-03434 (platform-hotfix), 12.5.0-02283, 12.5.0-02624, and 12.5.0-02800 (platform-hotfix). 

CVE-2026-15409 and CVE-2026-15410 Explained 

CVE-2026-15409 is a server-side request forgery (SSRF) vulnerability in the SMA1000 Appliance Work Place interface. According to SonicWall, an unauthenticated remote attacker could force the appliance to send requests to unintended locations. The flaw carries a CVSS v3 score of 10.0 with the vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H and is mapped to CWE-918.  CVE-2026-15410 is a post-authentication code injection vulnerability in the SMA1000 Appliance Management Console (AMC). Under specific conditions, a remote authenticated attacker with administrator privileges could execute arbitrary operating system commands, enabling Remote Code Execution. The vulnerability has a CVSS score of 7.2, uses the vector CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H, and is associated with CWE-94. 

Active Exploitation and Impact 

SonicWall confirmed that CVE-2026-15409 and CVE-2026-15410 are being actively exploited. The advisory states, "SonicWall PSIRT has investigated multiple cases indicating the active exploitation of the vulnerabilities described in this advisory. Customers are strongly urged to upgrade to the hotfix release as soon as possible to remediate these vulnerabilities."  The vulnerabilities may allow Remote Code Execution and bypass of security restrictions, increasing the risk of unauthorized system access. 

Fixed Versions and Detection Guidance 

SonicWall has released fixes in 12.4.3-03453 (platform-hotfix) and later, and 12.5.0-02835 (platform-hotfix) and later. The company noted that these issues do not affect SSL-VPN running on SonicWall firewalls or the SMA 100 Series product line.  Administrators are advised to inspect extraweb_access.log for HTTP 200 requests to /api/login or /api/logout, suspicious /wsproxy requests returning HTTP 101, ctrl-service.log entries indicating hotfix rollbacks with path traversal names, and unauthorized /api/login or /api/logout routes in /var/lib/unit/conf.json.  If indicators of compromise are found, SonicWall recommends re-imaging hardware appliances or redeploying virtual appliances, changing user and administrator passwords, and resetting TOTP tokens after performing a forensic investigation.  The advisory, SNWLID-2026-0008, was first published and last updated on July 14, 2026. The vulnerabilities were internally discovered by Adam Babis of SonicWall PSIRT, while Sean Koessel and Steven Adair of Volexity were credited in Version 1.1 for helping identify an additional indicator of compromise during the investigation. On the same day, CISA added the vulnerabilities to its Known Exploited Vulnerabilities Catalog. 

Microsoft’s Largest Patch Tuesday Fixes 622 Vulnerabilities, Two Under Active Attack

Microsoft Patch Tuesday

Microsoft Patch Tuesday July 2026 delivered the company's largest security update to date, addressing 622 Microsoft CVEs, more than tripling the roughly 200 vulnerabilities patched in June. Among the fixes are two zero-day vulnerabilities—CVE-2026-56164 and CVE-2026-56155—that Microsoft confirmed are being actively exploited, making them the highest-priority updates in this month's release.  According to Microsoft's July 2026 Security Updates, the release includes patches across multiple product families. Windows accounts for the largest share with 416 vulnerabilities, followed by Office with 82, Microsoft Edge with 46, Developer Tools with 27, SharePoint Server with 17, Azure with 11, SQL Server with eight, Defender and Exchange Server with five each, and four additional updates categorized under Other. Microsoft also republished 428 non-Microsoft Chromium CVEs. 

Microsoft Patch Tuesday July 2026 Highlights Exploited Vulnerabilities 

The two most significant flaws in Microsoft Patch Tuesday July 2026 are CVE-2026-56164 and CVE-2026-56155, both elevation-of-privilege vulnerabilities affecting critical enterprise infrastructure.  CVE-2026-56164 impacts on-premises Microsoft SharePoint Server and allows an unauthenticated attacker to elevate privileges remotely over the network without requiring credentials or user interaction. Microsoft said the vulnerability was discovered by Mandiant incident responders and Google's FLARE team, suggesting it was identified during investigations into active attacks. However, the company has not disclosed how the flaw was exploited or who was responsible.  Microsoft also noted that enabling the Antimalware Scan Interface (AMSI) in Full Mode can help reduce the attack risk. The update arrives on the same day that SharePoint Server 2016 and SharePoint Server 2019 reach the end of extended support. Unlike Windows Server and SQL Server, these products do not have a paid Extended Security Updates (ESU) program. SharePoint has remained a frequent target since the ToolShell attack chain affected unpatched servers in 2025. 

The Second Vulnerability (CVE-2026-56155)

The second actively exploited vulnerability, CVE-2026-56155, affects Active Directory Federation Services (AD FS). Microsoft said the flaw enables an authenticated attacker to elevate privileges locally because of weak access controls. The company's Detection and Response Team (DART) reported the issue. While Microsoft has not disclosed the exact privileges attackers gained or how the vulnerability was used, AD FS plays a critical role by issuing authentication tokens across enterprise environments, increasing the potential impact of a successful attack.  Beyond these two zero-days, Microsoft identified CVE-2026-50661, a Windows BitLocker Security Feature Bypass vulnerability, as publicly known.  As of publication, neither CVE-2026-56164 nor CVE-2026-56155 has been added to the U.S. Cybersecurity and Infrastructure Security Agency's Known Exploited Vulnerabilities (KEV) catalog. However, Microsoft has already classified both as exploited through its own exploitability assessment. The company also assigned the SharePoint flaw a relatively low severity rating, highlighting that active exploitation should take precedence over severity scores when prioritizing remediation. 
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