What is CVE-2021-25274?

CVE-2021-25274 is a critical-severity vulnerability in Solarwinds Orion Platform, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-02-03.

How severe is CVE-2021-25274?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-25274 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Solarwinds Orion Platform

CVE-2021-25274

The Collector Service in SolarWinds Orion Platform before 2020.2.4 uses MSMQ (Microsoft Message Queue) and doesn't set permissions on its private queues. As a result, remote unauthenticated clients can send messages to TCP port 1801 that the Collector Service will process. Additionally, upon processing of such messages, the service deserializes them in insecure manner, allowing remote arbitrary code execution as LocalSystem.

Vulnerability class: Insecure Deserialization

EPSS: 0.364 (98.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Solarwinds Orion_platform
N/a — versions n/a

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-25274?: CVE-2021-25274 is a critical-severity vulnerability in Solarwinds Orion Platform, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-02-03.
How severe is CVE-2021-25274?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-25274 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.