CVE-2020-6099: An exploitable code execution vulnerability exists in the file format parsing functionality of Graphisoft BIMx

This month

HIGH 7.8DOWNGRADE

CVE-2020-6099 is a high-severity flaw (CVSS 7.8) affecting bimx desktop viewer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An exploitable code execution vulnerability exists in the file format parsing functionality of Graphisoft BIMx Desktop Viewer 2019.2.2328. A specially crafted file can cause a heap buffer overflow resulting in a code execution. An attacker can provide a malicious file to trigger this vulnerability.

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	None
User interaction	Required
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-680, CWE-190
Published	2022-04-18
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: graphisoft

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

Am I affected?

Timeline

2022-04-18 17:15 UTCPublished CVE record published
2026-06-17 03:22 UTCUpdated Record last modified

graphisoft bimx desktop viewer DOWNGRADE

Affected: 2019.2.2328

Fixed in: no fixed release known

Safe to downgrade to: a release before 2019.2.2328

1. Check installed version

apt-cache policy bimx-desktop-viewer || rpm -q bimx-desktop-viewer || bimx-desktop-viewer --version

2. No fixed release: DOWNGRADE to a release before 2019.2.2328 (Debian / Ubuntu)

apt-cache madison bimx-desktop-viewer sudo apt install bimx-desktop-viewer=<VERSION_BEFORE_2019.2.2328> sudo apt-mark hold bimx-desktop-viewer

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

dnf --showduplicates list bimx-desktop-viewer sudo dnf downgrade bimx-desktop-viewer-<VERSION_BEFORE_2019.2.2328> sudo dnf versionlock add bimx-desktop-viewer

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-2020-6099?

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

Is CVE-2020-6099 being exploited?

CVE-2020-6099 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-2020-6099 affect?

CVE-2020-6099 affects bimx desktop viewer. Severity is high (CVSS 7.8). An exploitable code execution vulnerability exists in the file format parsing functionality of Graphisoft BIMx Desktop Viewer 2019.2.2328. A specially crafted file can cause a heap buffer overflow resulting in a code execution. An attacker

How urgent is CVE-2020-6099?

Priority 49/100. High severity; Public exploit reference

References

← Back to latest CVEs