CVE-2020-15858

What it is

Some devices of Thales DIS (formerly Gemalto, formerly Cinterion) allow Directory Traversal by physically proximate attackers. The directory path access check of the internal flash file system can be circumvented. This flash file system can store application-specific data and data needed for customer Java applications, TLS and OTAP (Java over-the-air-provisioning) functionality. The affected products and releases are: BGS5 up to and including SW RN 02.000 / ARN 01.001.06 EHSx and PDSx up to and including SW RN 04.003 / ARN 01.000.04 ELS61 up to and including SW RN 02.002 / ARN 01.000.04 ELS81 up to and including SW RN 05.002 / ARN 01.000.04 PLS62 up to and including SW RN 02.000 / ARN 01.000.04

At a glance

Exploitability

Can be exploited with physical access without logging in, but needs a user to act. High risk of data exposure, data tampering.

Exploit odds

0.8% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2020-08-21 21:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 02:57 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.8% in the next 30 days (EPSS).
• Severity: 6.2 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2020-08-21 21:15 UTC

Last modified

2026-06-17 02:57 UTC

Exploit probability

0.8% · EPSS, next 30 days

Weakness

CWE-22 · Path traversal

Record status

Modified

Affected

• Thalesgroup bgs5 Firmware ≤ rn_02.000_\/_arn_01.001.06
• Thalesgroup ehs5 Firmware ≤ rn_04.003_\/_arn_01.000.04
• Thalesgroup ehs8 Firmware ≤ rn_04.003_\/_arn_01.000.04
• Thalesgroup ehs6 Firmware ≤ rn_04.003_\/_arn_01.000.04
• Thalesgroup pds5 Firmware ≤ rn_04.003_\/_arn_01.000.04
• Thalesgroup pds6 Firmware ≤ rn_04.003_\/_arn_01.000.04
• Thalesgroup els61 Firmware ≤ rn_02.002_\/_arn_01.000.04
• Thalesgroup els81 Firmware ≤ rn_05.002_\/_arn_01.000.04

Attack profile CVSS 3.1 · 6.2

Attack vector

Physical

Complexity

Low

Privileges needed

None

User interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

Low

Is it in your code?

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