Is CVE-2021-21826 actively exploited?

CVE-2021-21826 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-21826?

CVE-2021-21826 has a CVSS score of 9.8 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2021-21826?

Patch guidance is available from att security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-21826.

Fix CVE-2021-21826 - CRITICAL att xmill

Description

A heap-based buffer overflow vulnerability exists in the XML Decompression DecodeTreeBlock functionality of AT&T Labs Xmill 0.7. Within `DecodeTreeBlock` which is called during the decompression of an XMI file, a UINT32 is loaded from the file and used as trusted input as the length of a buffer. An attacker can provide a malicious file to trigger this vulnerability.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-120 CWE-787 · Out-of-bounds Write

Metadata

Primary Vendor: ATT
Published: 8/20/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-21826

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary