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Critical SSRF Vulnerability Affects SonicWall SMA1000 Series Remote Access Appliances

SonicWall has disclosed four vulnerabilities in its SMA1000 series remote access products, with one rated critical. The most severe issue, CVE-2026-102255, is a server-side request forgery flaw in the WorkPlace interface that allows unauthenticated attackers to abuse the appliance as a forward proxy and reach internal functions. The vulnerability received the maximum CVSSv3.0 base score of 10.0. Two additional flaws, CVE-2026-102256 and CVE-2026-102257, enable authenticated OS command injection and unauthenticated path traversal via crafted archives, respectively. No exploitation has been observed in the wild at the time of disclosure. SonicWall has released updates to address all issues.

Security NEXTTranslated from Japanese

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SonicWall has published a security advisory detailing four vulnerabilities affecting its SMA1000 series remote access appliances, including one server-side request forgery (SSRF) flaw rated critical.

The advisory, released on October 6, 2026, assigns the highest severity rating of Critical to the set of issues. No active exploitation of any vulnerability had been confirmed at the time of publication.

The primary flaw, tracked as CVE-2026-102255, stems from an unintended alternate access path in the WorkPlace interface. Attackers can coerce the appliance into acting as a forward proxy, issuing requests that bypass authentication and reach internal functionality or perform unauthorized operations. The vulnerability carries a maximum CVSSv3.0 base score of 10.0.

Additional issues include an authenticated OS command injection vulnerability (CVE-2026-102256) and a path traversal flaw (CVE-2026-102257) that permits extraction of files outside the intended directory when processing a specially crafted archive, potentially leading to code execution.

SonicWall has made updates available for affected SMA1000 series appliances. Administrators are advised to apply the patches promptly.

SonicWallSMA1000CVE-2026-102255CVE-2026-102256CVE-2026-102257WorkPlace
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