CVE intelligence and bounded remediation

CVE-2022-26507 — A heap-based buffer overflow exists in XML Decompression DecodeTreeBlock in AT&T Labs Xmill 0.7

Critical CVSS 9.8

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

Severity
Critical
CVSS
9.8 (3.1)
Published
2022-04-14
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-787

Affected products

  • att / xmill / 0.7
  • schneider-electric / ecostruxure_control_expert
  • schneider-electric / ecostruxure_control_expert / 15.1
  • schneider-electric / ecostruxure_process_expert
  • schneider-electric / remoteconnect

Matched remediation archetype

Buffer bounds, memory safety, and memory corruption

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify affected native-code versions, build flags, architectures, parsers, codecs, drivers, and input paths in all shipped artifacts.
  • Determine whether untrusted data reaches the affected routine and the process privilege, sandbox, and network exposure.
  • Confirm statically linked, vendored, firmware, and platform-provided copies, not only package-manager records.

Remediate safely

  • Apply the maintained upstream correction or replace the affected component, then rebuild every dependent artifact from clean inputs.
  • Adopt bounds-checked interfaces, validated sizes and integer conversions, clear ownership, and memory-safe components where practical.
  • Enable supported compiler and runtime hardening and add sanitized tests and fuzz regression seeds derived from non-weaponized fixtures.

Authoritative sources

Complete CVE record and remediation plan

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