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CVE-2021-39392

CRITICALCVSS 9.8/10EPSS 2.19%

Last modified

CVE-2021-39392 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 2.19% chance of exploitation in the next 30 days.

Description

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.

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
2.19%

80.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
MylittletoolsMylittlebackup<= 1.7

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2021-39392?
CVE-2021-39392 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.19% probability of exploitation in the next 30 days.
How do I fix CVE-2021-39392?
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-2021-39392?

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

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Source: NVD / NIST