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CVE-2021-35250

40
FAUCET Score

CVE-2021-35250 is a directory traversal vulnerability affecting SolarWinds Serv-U 15.3, which could allow an unauthenticated attacker to access sensitive files related to the Serv-U installation and server. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with no user interaction, potentially leading to high confidentiality impact. While not listed on CISA's KEV catalog, Nuclei templates exist for detection, and its high EPSS score indicates a significant probability of exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
15.3CPE matchmatch criteria
cpe:2.3:a:solarwinds:serv-u:15.3:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
14.66%
Probability of exploitation in next 30 days
EPSS Percentile
96.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2021-35250 · Apr 15, 2023
This CVE's current EPSS score of 0.1466 is in the 94th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.solarwinds.com / SuccessCenter/s/article/Serv-U-15-3-HotFix-1
Vendor Advisory
solarwinds.com / trust-center/security-advisories/cve-2021-35250
Vendor Advisory