What’s Vulnerable › Vulnerabilities

CVE-2020-35488

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 7.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-01-05 · updated 2026-06-17
• Weakness: CWE-502

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.)

Affected products

• Nxlog: before 3.0.2272 — fixed in 3.0.2272

How to fix

Upgrade to a fixed version: Nxlog 3.0.2272. Check the vendor advisory for mitigations.

References

• https://github.com/GuillaumePetit84/CVE-2020-35488
• https://gitlab.com/nxlog-public/nxlog-ce/-/blob/master/ChangeLog.txt#L2
• https://github.com/GuillaumePetit84/CVE-2020-35488
• https://gitlab.com/nxlog-public/nxlog-ce/-/blob/master/ChangeLog.txt#L2

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