NVD / CVE Program· CNA schneider

CVE-2021-22797: A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal) vulnerability exists that could cause malicious scri

Noroxi assessment

Priority: Monitor (action score 39/100)

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: 26.1% (FIRST EPSS); higher than 97.9% of all records.
Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.

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

A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal) vulnerability exists that could cause malicious script to be deployed in an unauthorized location and may result in code execution on the engineering workstation when a malicious project file is loaded in the engineering software. Affected Product: EcoStruxure Control Expert (V15.0 SP1 and prior, including former Unity Pro), EcoStruxure Process Expert (2020 and prior, including former HDCS), SCADAPack RemoteConnect for x70 (All versions)

HighCVSS 7.8 · v3.1—No exploit No fix recorded

Path traversal

Published: Apr 13, 2022
Updated: Jun 16, 2026
EPSS: 26.1% · 97th percentile
CWE: CWE-22

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 8 / 30 · 26.1%

CNA vs NVD score

NVD: 7.8
CNA · schneider: 7.8; agree

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

If any of these changes, we'll tell you in the daily email digest.

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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
schneider-electric	ecostruxure control expert	cpe:2.3:a:schneider-electric:ecostruxure_control_expert
schneider-electric	ecostruxure process expert	cpe:2.3:a:schneider-electric:ecostruxure_process_expert
schneider-electric	remoteconnect	cpe:2.3:a:schneider-electric:remoteconnect
schneider-electric	scadapack 470	cpe:2.3:h:schneider-electric:scadapack_470
schneider-electric	scadapack 474	cpe:2.3:h:schneider-electric:scadapack_474
schneider-electric	scadapack 570	cpe:2.3:h:schneider-electric:scadapack_570
schneider-electric	scadapack 574	cpe:2.3:h:schneider-electric:scadapack_574
schneider-electric	scadapack 575	cpe:2.3:h:schneider-electric:scadapack_575

Affected versions

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

schneider-electric ecostruxure control expertbefore 15.1
schneider-electric ecostruxure process expertbefore 2021
schneider-electric remoteconnectall versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (schneider). Independent of NVD's CPE analysis and usually ahead of it.

Schneider Electric EcoStruxure Control Expert
- unspecified and later · before V15.0 SP1affected
Schneider Electric EcoStruxure Process Expert
- unspecified and later · before 2020affected
Schneider Electric SCADAPack RemoteConnect for x70
- All versionsaffected

Same product

schneider-electric: all records

Other highest-scoring records for the same primary product.

CVE-2020-28212A CWE-307: Improper Restriction of Excessive Authentication Attempts vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (n
40Plan
CVE-2022-45789A CWE-294: Authentication Bypass by Capture-replay vulnerability exists that could cause execution of unauthorized Modbus functions on the c
39Monitor
CVE-2022-45788A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause arbitrary code execution, denial of se
39Monitor

Published before and after this one in the same product

← EarlierCVE-2022-24322Mar 9, 2022 · A CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability exists that could cause a disruption of com
23Monitor
← EarlierCVE-2022-24323Mar 9, 2022 · A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause a disruption of communication between
23Monitor
Later →CVE-2022-37300Sep 12, 2022 · A CWE-640: Weak Password Recovery Mechanism for Forgotten Password vulnerability exists that could cause unauthorized access in read and wri
39Monitor

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).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
No account or password is required.
A user must open a link or visit a page.
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: high · the service can be disrupted

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

Weakness class (CWE)

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

CVSS vector

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

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

www.se.com/ww/en/download/document/SEVD-2021-257-01/

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

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