CVE-2020-35138

Name: CVE-2020-35138
Creator: NVD / NIST
Published: 2021-03-29T20:15:13.077+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.19%

Last modified Jun 17, 2026

CVE-2020-35138 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The MobileIron agents through 2021-03-22 for Android and iOS contain a hardcoded encryption key, used to encrypt the submission of username/password details during the authentication process, as demonstrated by Mobile@Work (aka com.mobileiron). The key is in the com/mobileiron/common/utils/C4928m.java file. EPSS estimates a 1.19% chance of exploitation in the next 30 days.

Description

The MobileIron agents through 2021-03-22 for Android and iOS contain a hardcoded encryption key, used to encrypt the submission of username/password details during the authentication process, as demonstrated by Mobile@Work (aka com.mobileiron). The key is in the com/mobileiron/common/utils/C4928m.java file. NOTE: It has been asserted that there is no causality or connection between credential encryption and the MiTM attack

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

1.19%

63.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-798

Affected Software

Vendor	Product	Versions
Mobileiron	Mobile\@Work	<= 2021-03-22

References

https://github.com/optiv/rustyIronExploit, Third Party Advisory
https://play.google.com/store/apps/details?id=com.mobileiron&hl=en_US&gl=USProduct, Third Party Advisory
https://www.ivanti.com/blog/a-warranted-response-to-inaccurate-optiv-researchThird Party Advisory
https://www.optiv.com/explore-optiv-insights/source-zero/mobileiron-mdm-contains-static-key-allowing-account-enumerationExploit, Third Party Advisory
https://www.optiv.com/insights/source-zero/blog/mobileiron-mdm-contains-static-key-allowing-account-enumerationExploit, Third Party Advisory
https://github.com/optiv/rustyIronExploit, Third Party Advisory
https://play.google.com/store/apps/details?id=com.mobileiron&hl=en_US&gl=USProduct, Third Party Advisory
https://www.ivanti.com/blog/a-warranted-response-to-inaccurate-optiv-researchThird Party Advisory
https://www.optiv.com/explore-optiv-insights/source-zero/mobileiron-mdm-contains-static-key-allowing-account-enumerationExploit, Third Party Advisory
https://www.optiv.com/insights/source-zero/blog/mobileiron-mdm-contains-static-key-allowing-account-enumerationExploit, Third Party Advisory

Timeline

Published: Mar 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-35138?

How severe is CVE-2020-35138?

CVE-2020-35138 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.19% probability of exploitation in the next 30 days.

How do I fix CVE-2020-35138?

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-2020-35138?

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

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Source: NVD / NIST