CVE-2020-27384: The Gw2-64.exe in Guild Wars 2 launcher version 106916 suffers from an elevation of privileges vulnerability w

Routine

HIGH 7.8DOWNGRADE

CVE-2020-27384 is a high-severity flaw (CVSS 7.8) affecting guild wars 2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Gw2-64.exe in Guild Wars 2 launcher version 106916 suffers from an elevation of privileges vulnerability which can be used by an "Authenticated User" to modify the existing executable file with a binary of his choice. The vulnerability exist due to the improper permissions, with the 'F' flag (Full Control) for 'Everyone' group, making the entire directory 'Guild Wars 2' and its files and sub-dirs world-writable.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-276
Published	2021-06-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: arena

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

Am I affected?

Timeline

2021-06-09 15:15 UTCPublished CVE record published
2026-06-17 03:09 UTCUpdated Record last modified

arena guild wars 2 DOWNGRADE

Affected: 106916

Fixed in: no fixed release known

Safe to downgrade to: a release before 106916

1. Check installed version

apt-cache policy guild-wars-2 || rpm -q guild-wars-2 || guild-wars-2 --version

2. No fixed release: DOWNGRADE to a release before 106916 (Debian / Ubuntu)

apt-cache madison guild-wars-2 sudo apt install guild-wars-2=<VERSION_BEFORE_106916> sudo apt-mark hold guild-wars-2

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

dnf --showduplicates list guild-wars-2 sudo dnf downgrade guild-wars-2-<VERSION_BEFORE_106916> sudo dnf versionlock add guild-wars-2

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-2020-27384?

guild wars 2: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-27384 being exploited?

CVE-2020-27384 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-2020-27384 affect?

CVE-2020-27384 affects guild wars 2. Severity is high (CVSS 7.8). The Gw2-64.exe in Guild Wars 2 launcher version 106916 suffers from an elevation of privileges vulnerability which can be used by an "Authenticated User" to modify the existing executable file with a binary of his choice. The vulnerability

How urgent is CVE-2020-27384?

Priority 39/100. High severity; Public exploit reference

References

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