CVE-2020-16087: An issue was discovered in Zalo.exe in VNG Zalo Desktop 19.8.1.0

This month

HIGH 8.6DOWNGRADE

CVE-2020-16087 is a high-severity flaw (CVSS 8.6) affecting zalo desktop. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Zalo.exe in VNG Zalo Desktop 19.8.1.0. An attacker can run arbitrary commands on a remote Windows machine running the Zalo client by sending the user of the device a crafted file.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	8.6 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-74
Published	2020-08-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: vng

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

Am I affected?

Timeline

2020-08-13 13:15 UTCPublished CVE record published
2026-06-17 02:57 UTCUpdated Record last modified

vng zalo desktop DOWNGRADE

Affected: 19.8.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 19.8.1.0

1. Check installed version

apt-cache policy zalo-desktop || rpm -q zalo-desktop || zalo-desktop --version

2. No fixed release: DOWNGRADE to a release before 19.8.1.0 (Debian / Ubuntu)

apt-cache madison zalo-desktop sudo apt install zalo-desktop=<VERSION_BEFORE_19.8.1.0> sudo apt-mark hold zalo-desktop

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

dnf --showduplicates list zalo-desktop sudo dnf downgrade zalo-desktop-<VERSION_BEFORE_19.8.1.0> sudo dnf versionlock add zalo-desktop

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-2020-16087?

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

Is CVE-2020-16087 being exploited?

CVE-2020-16087 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-2020-16087 affect?

CVE-2020-16087 affects zalo desktop. Severity is high (CVSS 8.6). An issue was discovered in Zalo.exe in VNG Zalo Desktop 19.8.1.0. An attacker can run arbitrary commands on a remote Windows machine running the Zalo client by sending the user of the device a crafted file.

How urgent is CVE-2020-16087?

Priority 53/100. High severity; Public exploit reference

Software pages

Windows vulnerabilities

References

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