CVE-2017-15011: The named pipes in qtsingleapp in Qt 5.x, as used in qBittorrent and SugarSync, are configured for remote acce

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HIGH 7.5REMOTEDOWNGRADE

CVE-2017-15011 is a high-severity flaw (CVSS 7.5) affecting qt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The named pipes in qtsingleapp in Qt 5.x, as used in qBittorrent and SugarSync, are configured for remote access and allow remote attackers to cause a denial of service (application crash) via an unspecified string.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-119
Published	2017-10-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: qt

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

Am I affected?

Timeline

2017-10-04 01:29 UTCPublished CVE record published
2026-06-17 01:07 UTCUpdated Record last modified

qt qt DOWNGRADE

Affected: 5.0.0 · 5.0.1 · 5.1.0 · 5.2.0 · 5.3.0 · 5.4.0 · 5.5.0 · 5.6.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0.0

1. Check installed version

apt-cache policy qt || rpm -q qt || qt --version

2. No fixed release: DOWNGRADE to a release before 5.0.0 (Debian / Ubuntu)

apt-cache madison qt sudo apt install qt=<VERSION_BEFORE_5.0.0> sudo apt-mark hold qt

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list qt sudo dnf downgrade qt-<VERSION_BEFORE_5.0.0> sudo dnf versionlock add qt

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2017-15011?

qt: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-15011 being exploited?

CVE-2017-15011 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-2017-15011 affect?

CVE-2017-15011 affects qt. Severity is high (CVSS 7.5). The named pipes in qtsingleapp in Qt 5.x, as used in qBittorrent and SugarSync, are configured for remote access and allow remote attackers to cause a denial of service (application crash) via an unspecified string.

How urgent is CVE-2017-15011?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

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References

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