Is CVE-2022-26507 actively exploited?

No active exploitation of CVE-2022-26507 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-26507 be exploited remotely?

Yes. CVE-2022-26507 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-26507?

CVE-2022-26507 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2022-26507

CRITICAL

CVE-2022-26507

CWE-787Published: April 14, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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

NVD Source

Technical Analysis

CVE-2022-26507 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.