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Vulnerability record · CVE-2020-35488 · published 5 January 2021

CVE-2020-35488: Nxlog deserialization of untrusted data vulnerability

Nxlog · Nxlog

The fileop module of the NXLog service in NXLog Community Edition 2.10.2150 allows remote attackers to cause a denial of service (daemon crash) via a crafted Syslog payload to the Syslog service. This attack requires a specific configuration. Also, the name of the directory created must use a Syslog field. (For example, on Linux it is not possible to create a .. directory. On Windows, it is not possible to create a CON directory.)

7.5 CVSS 3.1 High EPSS 7.6% · top 5.7% CWE-502 · Deserialization of untrusted data
7.5CVSS 3.1 base score, v2 4.3
7.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The fileop module of the NXLog service in NXLog Community Edition 2.10.2150 allows remote attackers to cause a denial of service (daemon crash) via a crafted Syslog payload to the Syslog service. This attack requires a specific configuration. Also, the name of the directory created must use a Syslog field. (For example, on Linux it is not possible to create a .. directory. On Windows, it is not possible to create a CON directory.)

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

Affected products

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

References

LinkTags
https://github.com/GuillaumePetit84/CVE-2020-35488 ExploitMitigationThird Party Advisory
https://gitlab.com/nxlog-public/nxlog-ce/-/blob/master/ChangeLog.txt#L2 Release NotesThird Party Advisory
https://github.com/GuillaumePetit84/CVE-2020-35488 ExploitMitigationThird Party Advisory
https://gitlab.com/nxlog-public/nxlog-ce/-/blob/master/ChangeLog.txt#L2 Release NotesThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-35488), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.