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CVE-2021-25274

49
FAUCET Score

CVE-2021-25274 is a critical vulnerability affecting the SolarWinds Orion Platform before version 2020.2.4. It allows remote, unauthenticated attackers to achieve arbitrary code execution as LocalSystem due to insecure deserialization of messages sent to the Collector Service's private MSMQ queues on TCP port 1801. This vulnerability has a CVSS score of 9.8 (Critical), indicating a network-exploitable, low-complexity attack with high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation (KEV) or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, suggesting high awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
< 2020.2.4CPE matchmatch criteria
cpe:2.3:a:solarwinds:orion_platform:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
36.43%
Probability of exploitation in next 30 days
EPSS Percentile
98.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.3643 is in the 96th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

trustwave.com / en-us/resources/blogs/spiderlabs-blog/full-system-control-with-new-solarwinds-orion-based-and-serv-u-ftp-vulnerabilities
ExploitPatchThird Party Advisory