Which products and versions are affected by CVE-2021-21801?

Affected: R-Seenet (Advantech) versions 2.4.12; Advantech versions >= Advantech R-SeeNet 2.4.12 (20.10.2020). The full list is in the CVE brief.

Is CVE-2021-21801 being exploited in the wild?

It is exploited in the wild, listed in Industry KEV feed since Sep 19, 2024.

Is CVE-2021-21801 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2021-21801?

No public exploit code is known.

Is there a fix for CVE-2021-21801?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2021-21801 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2021-21801

MediumExploited

This vulnerability is present in device_graph_page.php script, which is a part of the Advantech R-SeeNet web applications.

Published Jul 16, 2021 · Updated Nov 21, 2024

Key Facts

Patch immediately

CVE-2021-21801 is a medium-severity vulnerability (CVSS 6.1 v3.1) affecting R-Seenet (Advantech), Advantech.
It is exploited in the wild, listed in Industry KEV feed since Sep 19, 2024. No public exploit code is known.
EPSS estimates a 63% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

6.1

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

EPSS (30-day exploit likelihood)

63%

Higher than 99.2% of all scored CVEs

Exploited in the wild

Yes

1 catalog listing

Public exploit code

None known

Get the full CVE-2021-21801 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

This vulnerability is present in device_graph_page.php script, which is a part of the Advantech R-SeeNet web applications. A specially crafted URL by an attacker and visited by a victim can lead to arbitrary JavaScript code execution.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
Industry KEV feed	Sep 19, 2024	n/a	Not reported

Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
R-SeenetAdvantech	2.4.12	n/a
Advantech	>= Advantech R-SeeNet 2.4.12 (20.10.2020)	n/a

Timeline

Publicly disclosed
Jul 16, 2021
Added to Industry KEV feed
Sep 19, 2024
Last updated
Nov 21, 2024

Weakness Type

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References

exploithttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1272
exploitVulnCheck exploitation report
exploitVulnCheck exploitation report
exploitVulnCheck exploitation report

FAQ

Common Questions.

This vulnerability is present in device_graph_page.php script, which is a part of the Advantech R-SeeNet web applications.
Affected: R-Seenet (Advantech) versions 2.4.12; Advantech versions >= Advantech R-SeeNet 2.4.12 (20.10.2020). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Sep 19, 2024.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2021-21801 Running On Your Attack Surface?

Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.