What is CVE-2021-39392?

CVE-2021-39392 is a critical-severity vulnerability in Mylittletools Mylittlebackup, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-09-15.

How severe is CVE-2021-39392?

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

Deserialization in Mylittletools Mylittlebackup

CVE-2021-39392

The management tool in MyLittleBackup up to and including 1.7 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers' installations) in web.config, and can be used to send serialized ASP code.

Vulnerability class: Insecure Deserialization

EPSS: 0.023 (81.5th 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

Mylittletools Mylittlebackup
N/a — versions n/a

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

cve@mitre.org (x_refsource_MISC, Broken Link)
cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-39392?: CVE-2021-39392 is a critical-severity vulnerability in Mylittletools Mylittlebackup, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-09-15.
How severe is CVE-2021-39392?: Critical severity. CVSS v3 base score is 9.8 out of 10.