dbcve.org
XmillApplication · Att

CVE-2022-26507

CRITICAL · 9.8 CVSS v3.1 Published 2022-04-14
Fix available
A fix is available. Upgrade to 15.1 / 2021 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A heap-based buffer overflow exists in XML Decompression DecodeTreeBlock in AT&T Labs Xmill 0.7. A crafted input file can lead to remote code execution. This is not the same as any of: CVE-2021-21810, CVE-2021-21811, CVE-2021-21812, CVE-2021-21815, CVE-2021-21825, CVE-2021-21826, CVE-2021-21828, CVE-2021-21829, or CVE-2021-21830. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Heap-based buffer overflow vulnerability in Xmill 0.7's XML decompression functionality (DecodeTreeBlock). When parsing a specially crafted malicious XML file, the DecodeTreeBlock function improperly handles compressed data during decompression, overflowing the heap buffer and potentially allowing arbitrary code execution.

MitigationSince Xmill is no longer supported by the maintainer, immediate mitigation involves not processing untrusted XML files with this software. Consider migrating to actively maintained XML processing alternatives or implementing strict input validation/ sandboxing if continued use is unavoidable.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
XmillApplication
Affected:= 0.7
Ecostruxure Control ExpertApplication
Affected:< 15.1= 15.1
Ecostruxure Process ExpertApplication
Affected:< 2021
RemoteconnectApplication
Affected:all versions

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify Xmill installation
    Search for Xmill executable or installation directory on the system; check common installation paths or use system package manager
    Affected if Xmill version 0.7 is installed and used to decompress XML files
  2. Identify Schneider Electric Ecostruxure Control Expert installation
    Locate Ecostruxure Control Expert installation directory or check installed programs list; retrieve version information from the software or Windows registry
    Affected if Ecostruxure Control Expert version 15.1 or lower (< 15.1) is installed and processes XML files
  3. Identify Schneider Electric Ecostruxure Process Expert installation
    Locate Ecostruxure Process Expert installation directory or check installed programs list; retrieve version information
    Affected if Ecostruxure Process Expert version prior to 2021 is installed and processes XML files
  4. Identify Schneider Electric Remoteconnect installation
    Locate Remoteconnect installation directory or check installed programs list; retrieve version information
    Affected if Remoteconnect of any version is installed and processes XML files

The environment is affected if any of the identified products (Xmill 0.7, Ecostruxure Control Expert <= 15.1, Ecostruxure Process Expert < 2021, or Remoteconnect any version) are installed and used to decompress untrusted XML files containing specially crafted compressed data.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 15.1 / 2021 or later
Fixed in 15.12021
Interim mitigation

Since Xmill is no longer supported by the maintainer, immediate mitigation involves not processing untrusted XML files with this software. Consider migrating to actively maintained XML processing alternatives or implementing strict input validation/ sandboxing if continued use is unavoidable.

Recommended fix High confidence
  1. This vulnerability affects Xmill 0.7 and several Schneider Electric products that are explicitly noted as no longer supported by the maintainer.
  2. No fixed version, patch, or upgrade path is available from the vendor for this vulnerability.
  3. Replace affected systems with currently supported versions of the software/products.
  4. If replacement is not immediately possible, implement network segmentation to limit exposure to the affected systems.
  5. Monitor vendor documentation for any future security updates or replacement recommendations.
Caveat The affected products are end-of-life and no longer supported; there is no upgrade path available

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Xmill Scoped from the published advisory
  • Consultation4.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA1.0 h
10.0 hours of engineering $1,790
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,864.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2022-26507 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-26507 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data