CVE-2015-7665: Tails before 1.7 includes the wget program but does not prevent automatic fallback from passive FTP to active

Q: How do I fix CVE-2015-7665?

tails: upgrade to newer than 1.6. Exact commands for each OS are on this page.

Q: Is CVE-2015-7665 being exploited?

CVE-2015-7665 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2015-7665 affect?

CVE-2015-7665 affects tails. Severity is medium (CVSS 5.3). Tails before 1.7 includes the wget program but does not prevent automatic fallback from passive FTP to active FTP, which allows remote FTP servers to discover the Tor client IP address by reading a (1) PORT or (2) EPRT command. NOTE: withi

Q: How urgent is CVE-2015-7665?

Priority 43/100. Remotely exploitable, no login, no user action

This month

MEDIUM 5.3REMOTEUPGRADE

CVE-2015-7665 is a medium-severity flaw (CVSS 5.3) affecting tails. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Tails before 1.7 includes the wget program but does not prevent automatic fallback from passive FTP to active FTP, which allows remote FTP servers to discover the Tor client IP address by reading a (1) PORT or (2) EPRT command. NOTE: within wget itself, the automatic fallback is not considered a vulnerability by CVE.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-200
Published	2015-12-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tails project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-12-27 19:59 UTCPublished CVE record published
2026-06-17 00:32 UTCUpdated Record last modified

tails project tails UPGRADE

Affected: <= 1.6

Fixed in: newer than 1.6

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-7665?

tails: upgrade to newer than 1.6. Exact commands for each OS are on this page.

Is CVE-2015-7665 being exploited?

CVE-2015-7665 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-7665 affect?

CVE-2015-7665 affects tails. Severity is medium (CVSS 5.3). Tails before 1.7 includes the wget program but does not prevent automatic fallback from passive FTP to active FTP, which allows remote FTP servers to discover the Tor client IP address by reading a (1) PORT or (2) EPRT command. NOTE: withi

How urgent is CVE-2015-7665?

Priority 43/100. Remotely exploitable, no login, no user action

References

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