What is CVE-2021-21828?

CVE-2021-21828 is a critical-severity vulnerability in Att Xmill, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-08-20.

How severe is CVE-2021-21828?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Att Xmill

CVE-2021-21828

A heap-based buffer overflow vulnerability exists in the XML Decompression DecodeTreeBlock functionality of AT&T Labs Xmill 0.7. In the default case of DecodeTreeBlock a label is created via CurPath::AddLabel in order to track the label fo…

Vulnerability class: Buffer Overflow

EPSS: 0.011 (62.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Att Xmill — versions 0.7
N/a At&t — versions AT&T Labs Xmill 0.7, Schneider Electric EcoStruxure Control Expert 15

Weakness classification (CWE)

References

talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-21828?: CVE-2021-21828 is a critical-severity vulnerability in Att Xmill, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-08-20.
How severe is CVE-2021-21828?: Critical severity. CVSS v3 base score is 9.8 out of 10.