CVE-2022-26507

Name: CVE-2022-26507
Creator: NVD / NIST
Published: 2022-04-14T13:15:11.637+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.21%

Last modified Jun 17, 2026

CVE-2022-26507 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 2.21% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.21%

80.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Att	Xmill	0.7
Schneider-Electric	Ecostruxure Control Expert	< 15.1
Schneider-Electric	Ecostruxure Control Expert	15.1
Schneider-Electric	Ecostruxure Process Expert	< 2021
Schneider-Electric	Remoteconnect	All versions

References

https://Claroty.comNot Applicable, Third Party Advisory
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-02Mitigation, Release Notes, Third Party Advisory
https://Claroty.comNot Applicable, Third Party Advisory
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-02Mitigation, Release Notes, Third Party Advisory

Timeline

Published: Apr 14, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-26507?

How severe is CVE-2022-26507?

CVE-2022-26507 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.21% probability of exploitation in the next 30 days.

How do I fix CVE-2022-26507?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-26507?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST