What is CVE-2016-6255?

CVE-2016-6255 is a high-severity vulnerability in Libupnp Project, classified under Improper Access Control. CVSS score: 7.5/10. Published 2017-03-07.

How severe is CVE-2016-6255?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2016-6255 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Libupnp Project

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 a registered handler.

Published 2017-03-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.266 (98.0th percentile), scored 2026-09-28.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.266 · newest: 0.266 · change: 0.000

Affected products

Libupnp Project
Debian Linux — versions 8.0

Weakness classification (CWE)

CWE-284 — Improper Access Control

Public proof-of-concept exploits

References

www.openwall.com/lists/oss-security/2016/07/20/5 (mailing-list, Patch, Mailing List, Third Party Advisory)
twitter.com/mjg59/status/755062278513319936 (Third Party Advisory)
github.com/mjg59/pupnp-code/commit/be0a01bdb83395d9f3a5ea09c1308a4f1a972cbd (Patch, Third Party Advisory, Issue Tracking)
sourceforge.net/p/pupnp/code/ci/master/tree/ChangeLog (Third Party Advisory, Release Notes)
security.gentoo.org/glsa/201701-52 (vendor-advisory)
www.exploit-db.com/exploits/40589/ (exploit)
www.tenable.com/security/research/tra-2017-10
www.openwall.com/lists/oss-security/2016/07/18/13 (mailing-list, Patch, Mailing List, Third Party Advisory)
www.debian.org/security/2016/dsa-3736 (vendor-advisory, Third Party Advisory)
www.securityfocus.com/bid/92050 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2016-6255?: CVE-2016-6255 is a high-severity vulnerability in Libupnp Project, classified under Improper Access Control. CVSS score: 7.5/10. Published 2017-03-07.
How severe is CVE-2016-6255?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2016-6255 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.