What’s Vulnerable › Vulnerabilities

CVE-2021-31474

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 93.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-21 · updated 2026-06-17
• Weakness: CWE-502

Description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of SolarWinds Network Performance Monitor 2020.2.1. Authentication is not required to exploit this vulnerability. The specific flaw exists within the SolarWinds.Serialization library. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-12213.

Affected products

• SolarWinds Network Performance Monitor: from 2020.2.1 before 2020.2.5 — fixed in 2020.2.5

How to fix

Upgrade to a fixed version: SolarWinds Network Performance Monitor 2020.2.5. Check the vendor advisory for mitigations.

References

• https://documentation.solarwinds.com/en/success_center/sam/content/release_notes/sam_2020-2-5_release_notes.htm
• https://www.zerodayinitiative.com/advisories/ZDI-21-602/
• https://documentation.solarwinds.com/en/success_center/sam/content/release_notes/sam_2020-2-5_release_notes.htm
• https://www.zerodayinitiative.com/advisories/ZDI-21-602/

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