Public proof of conceptFix available

CVE-2016-4971

A public proof of concept exists; no exploitation attested.

Published2016-06-30

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

GNU wget before 1.18 allows remote servers to write to arbitrary files by redirecting a request from HTTP to a crafted FTP resource.

Timeline

dates in UTC

2016-06-3017:59CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-4971?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-4971?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Canonical ubuntu linux

Branch	Affected	Fixed in	Source
12.4	= 12.04	no fix published	NVD
14.4	= 14.04	no fix published	NVD
15.10	= 15.10	no fix published	NVD
16.4	= 16.04	no fix published	NVD

Palo Alto PAN-OS

Branch	Affected	Fixed in	Source
6.1	≥ 6.1.0, ≤ 6.1.16	no fix published	NVD
7.0	≥ 7.0.0, ≤ 7.0.14	no fix published	NVD
7.1	≥ 7.1.0, ≤ 7.1.9	no fix published	NVD

Oracle solaris

Branch	Affected	Fixed in	Source
10.x	= 10	no fix published	NVD
11.3	= 11.3	no fix published	NVD

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

git.savannah.gnu.orgPatch · Vendor Advisory
lists.gnu.orgPatch · Vendor Advisory
bugzilla.redhat.comPatch

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 3 repositories, unverifiedgitcollect/CVE-2016-4971mbadanoiu/CVE-2016-4971dinidhu96/IT19013756_-CVE-2016-4971-

Sources

NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.04.3read 2026-10-23
FIRST EPSSEPSS score46.1 %read 2026-10-23
PoC-in-GitHubproof of concept3read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2016-06-30
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2016-4971?

GNU wget before 1.18 allows remote servers to write to arbitrary files by redirecting a request from HTTP to a crafted FTP resource.

Is CVE-2016-4971 actively exploited?

Active exploitation of CVE-2016-4971 has not been confirmed. Its EPSS score was 46.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-4971?

CVE-2016-4971 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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