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Vulnerability record · CVE-2021-21804 · published 16 July 2021

CVE-2021-21804: Advantech r-seenet php remote file inclusion vulnerability

Advantech · R Seenet

A local file inclusion (LFI) vulnerability exists in the options.php script functionality of Advantech R-SeeNet v 2.4.12 (20.10.2020). A specially crafted HTTP request can lead to arbitrary PHP code execution. An attacker can send a crafted HTTP request to trigger this vulnerability.

9.8 CVSS 3.1 Critical EPSS 3.7% · top 10.6% CWE-98 · PHP remote file inclusionCWE-829 · Inclusion from untrusted sphere
9.8CVSS 3.1 base score, v2 7.5
3.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A local file inclusion (LFI) vulnerability exists in the options.php script functionality of Advantech R-SeeNet v 2.4.12 (20.10.2020). A specially crafted HTTP request can lead to arbitrary PHP code execution. An attacker can send a crafted HTTP request to trigger this vulnerability.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1273 ExploitThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1273 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-5642Advantech r-seenet information exposure vulnerabilityAdvantech R-SeeNet v2.4.23 allows an unauthenticated remote attacker to read from and write to the snmpmon.ini file, which contains sensitive informa…EPSS 17%9.8CVE-2023-2611Advantech r-seenet hard-coded credentials vulnerabilityAdvantech R-SeeNet versions 2.4.22 is installed with a hidden root-level user that is not available in the users list. This hidden user has a passwor…EPSS 0.67%9.8CVE-2022-3385Advantech r-seenet stack-based buffer overflow vulnerabilityAdvantech R-SeeNet Versions 2.4.17 and prior are vulnerable to a stack-based buffer overflow. An unauthorized attacker can remotely overflow the stac…EPSS 1.3%9.8CVE-2022-3386Advantech r-seenet stack-based buffer overflow vulnerabilityAdvantech R-SeeNet Versions 2.4.17 and prior are vulnerable to a stack-based buffer overflow. An unauthorized attacker can use an outsized filename t…EPSS 1.3%9.8CVE-2021-21805Advantech R-SeeNet ping.php OS command injectionAdvantech R-SeeNet v2.4.12 (20.10.2020) contains an OS command injection flaw in the ping.php script. A crafted HTTP request can cause arbitrary OS c…EPSS 70%analysed8.8CVE-2021-21915Advantech r-seenet sql injection vulnerabilityAn exploitable SQL injection vulnerability exist in the ‘group_list’ page of the Advantech R-SeeNet 2.4.15 (30.07.2021). A specially-crafted HTTP req…EPSS 1.4%8.8CVE-2021-21916Advantech r-seenet sql injection vulnerabilityAn exploitable SQL injection vulnerability exist in the ‘group_list’ page of the Advantech R-SeeNet 2.4.15 (30.07.2021). A specially-crafted HTTP req…EPSS 1.4%8.8CVE-2021-21917Advantech r-seenet sql injection vulnerabilityAn exploitable SQL injection vulnerability exist in the ‘group_list’ page of the Advantech R-SeeNet 2.4.15 (30.07.2021). A specially-crafted HTTP req…EPSS 1.4%

Source: NIST National Vulnerability Database (record CVE-2021-21804), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.