Network-traffic disclosure via unenforced encrypted connections
Published Nov 23, 2022 · Updated Apr 25, 2025
Cleartext transmission in SolarWinds Engineer's Toolset 2022.3 and earlier allows man-in-the-middle attackers to read network traffic. The application accepts unencrypted connections instead of enforcing SSL/TLS with HTTP Strict Transport Security. Attackers must be able to modify a legitimate user's network traffic; exposed information is limited to data carried by the downgraded connection.
Summary
What happened
Cleartext transmission in SolarWinds Engineer's Toolset 2022.3 and earlier allows man-in-the-middle attackers to read network traffic. The application accepts unencrypted connections instead of enforcing SSL/TLS with HTTP Strict Transport Security. Attackers must be able to modify a legitimate user's network traffic; exposed information is limited to data carried by the downgraded connection.
The record
- CVE
- CVE-2021-35246
- Published
- Nov 23, 2022
- Updated
- Apr 25, 2025
- Vendor
- SolarWinds
- Product
- Engineer's Toolset
- Classifications
- CWE-319, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 23, 2022CVE publishedPublication date reported by the CVE source.
- Apr 25, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2022.3 and previous versions
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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