NVD / CVE Program· CNA mitre

CVE-2020-15858: Some devices of Thales DIS (formerly Gemalto, formerly Cinterion) allow Directory Traversal by physically proximate attackers.

Noroxi assessment

Priority: Monitor (action score 25/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.78% (FIRST EPSS); higher than 56.2% of all records.
Physical access to the device is required. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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

MediumCVSS 6.4 · v3.1—No exploit No fix recorded

Path traversal

Published: Aug 21, 2020
Updated: Jun 16, 2026
EPSS: 0.7% · 56th percentile
CWE: CWE-22

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 25 / 40 · 6.4 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.7%

CNA vs NVD score

NVD: 6.4
CNA · mitre: 6.2; 0.2 point gap

CVSS:3.1/AC:L/AV:P/A:L/C:H/I:H/PR:N/S:U/UI:R

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
thalesgroup	bgs5 firmware	cpe:2.3:o:thalesgroup:bgs5_firmware
thalesgroup	bgs5	cpe:2.3:h:thalesgroup:bgs5
thalesgroup	ehs5 firmware	cpe:2.3:o:thalesgroup:ehs5_firmware
thalesgroup	ehs5	cpe:2.3:h:thalesgroup:ehs5
thalesgroup	ehs8 firmware	cpe:2.3:o:thalesgroup:ehs8_firmware
thalesgroup	ehs8	cpe:2.3:h:thalesgroup:ehs8
thalesgroup	ehs6 firmware	cpe:2.3:o:thalesgroup:ehs6_firmware
thalesgroup	ehs6	cpe:2.3:h:thalesgroup:ehs6
thalesgroup	pds5 firmware	cpe:2.3:o:thalesgroup:pds5_firmware
thalesgroup	pds5	cpe:2.3:h:thalesgroup:pds5
thalesgroup	pds6 firmware	cpe:2.3:o:thalesgroup:pds6_firmware
thalesgroup	pds6	cpe:2.3:h:thalesgroup:pds6

and 6 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

thalesgroup bgs5 firmwareup to rn_02.000_\/_arn_01.001.06 inclusive
thalesgroup ehs5 firmwareup to rn_04.003_\/_arn_01.000.04 inclusive
thalesgroup ehs6 firmwareup to rn_04.003_\/_arn_01.000.04 inclusive
thalesgroup ehs8 firmwareup to rn_04.003_\/_arn_01.000.04 inclusive
thalesgroup els61 firmwareup to rn_02.002_\/_arn_01.000.04 inclusive
thalesgroup els81 firmwareup to rn_05.002_\/_arn_01.000.04 inclusive
thalesgroup pds5 firmwareup to rn_04.003_\/_arn_01.000.04 inclusive
thalesgroup pds6 firmwareup to rn_04.003_\/_arn_01.000.04 inclusive
thalesgroup pls62 firmwareup to rn_02.000_\/_arn_01.000.04 inclusive

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-20-628 · Aug 21, 2020(Thales EHS8 IoT Zafiyeti)

All national notices →

Technical details

Attack conditions

Physical access to the device is required.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: low · the service can be disrupted

Attack vector: Physical
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: Low

Weakness class (CWE)

CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS vector

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

nvd-primary

Root cause

A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

The bug in code

The whole CWE-22 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const file = path.join(ROOT, req.query.name);
2res.sendFile(file);

Fixed

1const file = path.resolve(ROOT, req.query.name);
2if (!file.startsWith(ROOT + path.sep)) {
3  return res.sendStatus(400);
4}
5res.sendFile(file);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

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Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

packetstormsecurity.com/files/171978/Telit-Cinterion-IoT-Traversal-Escalation-Bypass-Heap-Overflow.html

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records