CVE-2018-3933: An exploitable out-of-bounds write exists in the Microsoft Word document conversion functionality of the Anten

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HIGH 8.8WATCHLISTDOWNGRADE

CVE-2018-3933 is a high-severity flaw (CVSS 8.8) affecting office server document converter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An exploitable out-of-bounds write exists in the Microsoft Word document conversion functionality of the Antenna House Office Server Document Converter version V6.1 Pro MR2 for Linux64 (6,1,2018,0312). A crafted Microsoft Word (DOC) document can lead to an out-of-bounds write, resulting in remote code execution. This vulnerability occurs in the `vbputanld` method.

Why this priority

High severity
Public exploit reference
On your watchlist

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	2.1% (top 19%)
CISA exploited list	No
Weakness	CWE-787
Published	2018-07-11
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: antennahouse

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

Am I affected?

Timeline

2018-07-11 16:29 UTCPublished CVE record published
2026-06-17 01:58 UTCUpdated Record last modified

antennahouse office server document converter DOWNGRADE

Affected: 6.1 mr2

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.1

1. Check installed version

apt-cache policy office-server-document-converter || rpm -q office-server-document-converter || office-server-document-converter --version

2. No fixed release: DOWNGRADE to a release before 6.1 (Debian / Ubuntu)

apt-cache madison office-server-document-converter sudo apt install office-server-document-converter=<VERSION_BEFORE_6.1> sudo apt-mark hold office-server-document-converter

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

dnf --showduplicates list office-server-document-converter sudo dnf downgrade office-server-document-converter-<VERSION_BEFORE_6.1> sudo dnf versionlock add office-server-document-converter

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-2018-3933?

office server document converter: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-3933 being exploited?

CVE-2018-3933 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-2018-3933 affect?

CVE-2018-3933 affects office server document converter. Severity is high (CVSS 8.8). An exploitable out-of-bounds write exists in the Microsoft Word document conversion functionality of the Antenna House Office Server Document Converter version V6.1 Pro MR2 for Linux64 (6,1,2018,0312). A crafted Microsoft Word (DOC) documen

How urgent is CVE-2018-3933?

Priority 61/100. High severity; Public exploit reference; On your watchlist

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References

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