Unrated

Arbitrary File Deletion in Western Digital My Cloud nas_sharing.cgi

IdentifiersCVE-2017-18181CWE-73

CVE-2017-18181 is an arbitrary file deletion vulnerability in the nas_sharing.cgi CGI component of Western Digital My Cloud personal cloud storage devices prior to firmware version 2.30.172. The vulnerable CGI binary accepts a path parameter that can be used to target files on the device for deletion without proper restriction or authorization enforcement. As a result, an attacker can cause deletion of arbitrary files on the underlying system, which can affect device integrity and availability and may contribute to broader device compromise when combined with other weaknesses.

For your environment

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an attacker to delete arbitrary files from the affected device. This can disrupt normal operation, corrupt configuration or application state, remove critical system files, and potentially render the device unstable or unusable. In operational contexts, arbitrary file deletion may also facilitate follow-on compromise by disabling protections, destroying logs, or preparing the system for additional exploitation.

Mitigation

If you can’t patch tonight, do this now.

Apply the vendor firmware update to version 2.30.172 or the latest available release. No separate temporary workaround or compensating control is specifically documented. Where immediate patching is not possible, reduce exposure of the management interface to untrusted networks and restrict access to trusted administrators only, though patching is the primary corrective action.

Remediation

Patch, then assume compromise.

Upgrade affected Western Digital My Cloud devices to firmware version 2.30.172 or later. Affected product lines include My Cloud Gen 2, My Cloud PR2100, My Cloud PR4100, My Cloud EX2 Ultra, My Cloud EX2, My Cloud EX4, My Cloud EX2100, My Cloud EX4100, My Cloud DL2100, and My Cloud DL4100.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Western Digital CorporationMy Cloudapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

1 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity