CVE-2019-9851: LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execu

Q: How do I fix CVE-2019-9851?

ubuntu linux: mitigate or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2019-9851 being exploited?

CVE-2019-9851 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-9851 affect?

CVE-2019-9851 affects ubuntu linux, debian linux, fedora. Severity is critical (CVSS 9.8). LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execute arbitrary python commands contained with the document it is launched from. Protection was added, to address CVE-2019-9848, to b

Q: How urgent is CVE-2019-9851?

Priority 74/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTMITIGATEMITIGATEMITIGATE

CVE-2019-9851 is a critical-severity flaw (CVSS 9.8) affecting ubuntu linux, debian linux, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execute arbitrary python commands contained with the document it is launched from. Protection was added, to address CVE-2019-9848, to block calling LibreLogo from document event script handers, e.g. mouse over. However LibreOffice also has a separate feature where documents can specify that pre-installed scripts can be executed on various glob

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	77.8% (top 1%)
CISA exploited list	No
Weakness	CWE-20
Published	2019-08-15
Last modified	2026-06-17

Publisher (CNA): Document Foundation, The · Vendor: canonical · debian · fedoraproject · libreoffice · opensuse

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

Am I affected?

Timeline

2019-08-15 22:15 UTCPublished CVE record published
2026-06-17 02:44 UTCUpdated Record last modified

canonical ubuntu linux MITIGATE

Affected: 16.04 · 18.04 · 19.04

Fixed in: no fixed release known

Safe to downgrade to: a release before 16.04

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

debian debian linux MITIGATE

Affected: 8.0 · 9.0 · 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

fedoraproject fedora MITIGATE

Affected: 29

Fixed in: no fixed release known

Safe to downgrade to: a release before 29

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

opensuse leap MITIGATE

Affected: 15.0 · 15.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 15.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

libreoffice libreoffice UPGRADE

Affected: < 6.2.6

Fixed in: 6.2.6

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 6.2.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade libreoffice

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libreoffice

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · root · FIXED · 6.40.04-7.fc46 · FEDORA-2026-7329868400 · source

sudo dnf upgrade --advisory=FEDORA-2026-7329868400

Debian 12 · libreoffice · FIXED · 1:6.3.0-1

sudo apt update && sudo apt install --only-upgrade libreoffice dpkg --compare-versions "$(dpkg-query -W -f='${Version}' libreoffice)" ge "1:6.3.0-1" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · libreoffice · FIXED · 1:6.3.0-1

sudo apt update && sudo apt install --only-upgrade libreoffice dpkg --compare-versions "$(dpkg-query -W -f='${Version}' libreoffice)" ge "1:6.3.0-1" && echo PATCHED || echo STILL-VULNERABLE

RHEL 7 · libreoffice · FIXED · libreoffice-5.3.6.1-24.el7

sudo dnf upgrade --advisory=RHSA-2020:1151 rpm -q libreoffice

RHEL 8 · libreoffice · FIXED · libreoffice-6.0.6.1-20.el8

sudo dnf upgrade --advisory=RHSA-2020:1598 rpm -q libreoffice

RHEL 6 · libreoffice · DEFERRED

Alpine 3.20 · libreoffice · FIXED · libreoffice-6.3.0.4-r0

apk add --upgrade libreoffice apk info -v libreoffice

Alpine 3.21 · libreoffice · FIXED · libreoffice-6.3.0.4-r0

apk add --upgrade libreoffice apk info -v libreoffice

Alpine 3.22 · libreoffice · FIXED · libreoffice-6.3.0.4-r0

apk add --upgrade libreoffice apk info -v libreoffice

Alpine 3.23 · libreoffice · FIXED · libreoffice-6.3.0.4-r0

apk add --upgrade libreoffice apk info -v libreoffice

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: www.libreoffice.org/about-us/security/advisories/CVE-2019-9851
Exploit-DB: LibreOffice < 6.2.6 Macro - Python Code Execution (Metasploit)
Metasploit: LibreOffice Macro Python Code Execution

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-2019-9851?

ubuntu linux: mitigate or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-9851 being exploited?

CVE-2019-9851 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-2019-9851 affect?

CVE-2019-9851 affects ubuntu linux, debian linux, fedora. Severity is critical (CVSS 9.8). LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execute arbitrary python commands contained with the document it is launched from. Protection was added, to address CVE-2019-9848, to b

How urgent is CVE-2019-9851?

Priority 74/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Python vulnerabilities · Ubuntu vulnerabilities · Debian vulnerabilities · LibreOffice vulnerabilities

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References

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