CVE-2016-6255

Exp

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 update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-6255 is rated High Exploit Risk (74.2/100): CVSS High severity, with high exploitation likelihood (EPSS 26.82%, 98th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2016-6255

EDB-ID Source Kind Published Link
40589 exploit_db edb 2016-10-20 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2016-6255

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 40.91% 26.82% -14.09%
2 2026-05-28 54.09% 40.91% -13.17%
3 2026-03-18 — 54.09% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-6255

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-6255

OS Trackers for CVE-2016-6255

vendor priority summary link
gentoo normal CVE-2016-6255: 1 GLSA(s) (201701-52), 1 atom(s) (net-libs/libupnp); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-6255
ubuntu high CVE-2016-6255 high priority: Ubuntu including 1 source packages (libupnp), 17 status rows across 17 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, precise, trusty, upstream, wily, xenial, yakkety, zesty): DNE 7, ignored 5, not-affected 2, released 2, needed 1. https://ubuntu.com/security/CVE-2016-6255

Affected software / configurations for CVE-2016-6255

Vendor Product Version Raw CPE
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
libupnp_project libupnp <= 1.6.20 cpe:2.3:a:libupnp_project:libupnp:*:*:*:*:*:*:*:*

References for CVE-2016-6255

cvelogic Threat Intelligence