CWE-1266 Base Incomplete

Improper Scrubbing of Sensitive Data from Decommissioned Device

This vulnerability occurs when a system lacks a reliable method for administrators to permanently erase sensitive information before taking hardware or software out of service. The data scrubbing…

Definition

What is CWE-1266?

This vulnerability occurs when a system lacks a reliable method for administrators to permanently erase sensitive information before taking hardware or software out of service. The data scrubbing feature might be missing, ineffective, or flawed, leaving confidential data behind.
When decommissioning a device or application—such as retiring a server, storage array, or IoT gadget—you must actively destroy any stored sensitive data. This process, often called data scrubbing or sanitization, is critical because simply deleting files or performing a factory reset often doesn't remove the underlying data from physical storage, making it recoverable by anyone with access to the hardware. Failure to properly scrub data exposes credentials, proprietary configurations, user information, and network details. Attackers can easily extract this information from discarded, sold, or repurposed equipment. To prevent this, you need built-in, verified secure erase functions that overwrite storage media according to recognized standards, going beyond basic deletion commands.
Real-world impact

Real-world CVEs caused by CWE-1266

No public CVE references are linked to this CWE in MITRE's catalog yet.

How attackers exploit it

Step-by-step attacker path

  1. 1

    Identify a code path that handles untrusted input without validation.

  2. 2

    Craft a payload that exercises the unsafe behavior — injection, traversal, overflow, or logic abuse.

  3. 3

    Deliver the payload through a normal request and observe the application's reaction.

  4. 4

    Iterate until the response leaks data, executes attacker code, or escalates privileges.

Vulnerable code example

Vulnerable pseudo

MITRE has not published a code example for this CWE. The pattern below is illustrative — see Resources for canonical references.

Vulnerable pseudo 
// Example pattern — see MITRE for the canonical references.
function handleRequest(input) {
  // Untrusted input flows directly into the sensitive sink.
  return executeUnsafe(input);
}
Secure code example

Secure pseudo

Secure pseudo 
// Validate, sanitize, or use a safe API before reaching the sink.
function handleRequest(input) {
  const safe = validateAndEscape(input);
  return executeWithGuards(safe);
}
What changed: the unsafe sink is replaced (or the input is validated/escaped) so the same payload no longer triggers the weakness.
Prevention checklist

How to prevent CWE-1266

  • Architecture and Design Functionality to completely scrub data from a product at the conclusion of its lifecycle should be part of the design phase. Trying to add this function on top of an existing architecture could lead to incomplete removal of sensitive information/data.
  • Policy The manufacturer should describe the location(s) where sensitive data is stored and the policies and procedures for its removal. This information may be conveyed, for example, in an Administrators Guide or a Statement of Volatility.
  • Implementation If the capability to wipe sensitive data isn't built-in, the manufacturer may need to provide a utility to scrub sensitive data from storage if that data is located in a place which is non-accessible by the administrator. One example of this could be when sensitive data is stored on an EEPROM for which there is no user/admin interface provided by the system.
Detection signals

How to detect CWE-1266

SAST High

Run static analysis (SAST) on the codebase looking for the unsafe pattern in the data flow.

DAST Moderate

Run dynamic application security testing against the live endpoint.

Runtime Moderate

Watch runtime logs for unusual exception traces, malformed input, or authorization bypass attempts.

Code review Moderate

Code review: flag any new code that handles input from this surface without using the validated framework helpers.

Plexicus auto-fix

Plexicus auto-detects CWE-1266 and opens a fix PR in under 60 seconds.

Codex Remedium scans every commit, identifies this exact weakness, and ships a reviewer-ready pull request with the patch. No tickets. No hand-offs.

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Frequently asked questions

Frequently asked questions

What is CWE-1266?

This vulnerability occurs when a system lacks a reliable method for administrators to permanently erase sensitive information before taking hardware or software out of service. The data scrubbing feature might be missing, ineffective, or flawed, leaving confidential data behind.

How serious is CWE-1266?

MITRE has not published a likelihood-of-exploit rating for this weakness. Treat it as medium-impact until your threat model proves otherwise.

What languages or platforms are affected by CWE-1266?

MITRE lists the following affected platforms: Not OS-Specific, Not Architecture-Specific, Not Technology-Specific.

How can I prevent CWE-1266?

Functionality to completely scrub data from a product at the conclusion of its lifecycle should be part of the design phase. Trying to add this function on top of an existing architecture could lead to incomplete removal of sensitive information/data. The manufacturer should describe the location(s) where sensitive data is stored and the policies and procedures for its removal. This information may be conveyed, for example, in an Administrators Guide or a Statement of Volatility.

How does Plexicus detect and fix CWE-1266?

Plexicus's SAST engine matches the data-flow signature for CWE-1266 on every commit. When a match is found, our Codex Remedium agent opens a fix PR with the corrected code, tests, and a one-line summary for the reviewer.

Where can I learn more about CWE-1266?

MITRE publishes the canonical definition at https://cwe.mitre.org/data/definitions/1266.html. You can also reference OWASP and NIST documentation for adjacent guidance.

Related weaknesses

Weaknesses related to CWE-1266

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Resources

Further reading

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