CVE-2018-15832: upc.exe in Ubisoft Uplay Desktop Client versions 63.0.5699.0 allows remote attackers to execute arbitrary code

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HIGH 8.8DOWNGRADE

CVE-2018-15832 is a high-severity flaw (CVSS 8.8) affecting uplay. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

upc.exe in Ubisoft Uplay Desktop Client versions 63.0.5699.0 allows remote attackers to execute arbitrary code. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the processing of URI handlers. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can lever

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	3.7% (top 10%)
CISA exploited list	No
Weakness	CWE-20
Published	2018-09-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ubisoft

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

Am I affected?

Timeline

2018-09-20 20:29 UTCPublished CVE record published
2026-06-17 01:43 UTCUpdated Record last modified

ubisoft uplay DOWNGRADE

Affected: 63.0.5699.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 63.0.5699.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 63.0.5699.0 (Debian / Ubuntu)

apt-cache madison uplay sudo apt install uplay=<VERSION_BEFORE_63.0.5699.0> sudo apt-mark hold uplay

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

dnf --showduplicates list uplay sudo dnf downgrade uplay-<VERSION_BEFORE_63.0.5699.0> sudo dnf versionlock add uplay

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-2018-15832?

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

Is CVE-2018-15832 being exploited?

CVE-2018-15832 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-2018-15832 affect?

CVE-2018-15832 affects uplay. Severity is high (CVSS 8.8). upc.exe in Ubisoft Uplay Desktop Client versions 63.0.5699.0 allows remote attackers to execute arbitrary code. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious fi

How urgent is CVE-2018-15832?

Priority 58/100. High severity; Public exploit reference

Related CVEs

CVE-2019-14737 HIGH 7.8 DOWNGRADE Ubisoft Uplay 92.0.0.6280 has Insecure Permissions.

References

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