No exploitation reportedFix available

CVE-2019-9853

Q: Is CVE-2019-9853 actively exploited?

Active exploitation of CVE-2019-9853 has not been confirmed. Its EPSS score was 3.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2019-9853?

CVE-2019-9853 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2019-09-27
Fixed in6.3.1 · 6.2.6
WeaknessCWE-116

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

LibreOffice documents can contain macros. The execution of those macros is controlled by the document security settings, typically execution of macros are blocked by default. A URL decoding flaw existed in how the urls to the macros within the document were processed and categorized, resulting in the possibility to construct a document where macro execution bypassed the security settings. The documents were correctly detected as containing macros, and prompted the user to their existence within the documents, but macros within the document were subsequently not controlled by the security settings allowing arbitrary macro execution This issue affects: LibreOffice 6.2 series versions prior to 6.2.7; LibreOffice 6.3 series versions prior to 6.3.1.

Timeline

dates in UTC

2019-09-2716:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-9853?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-9853?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Libreoffice

Branch	Affected	Fixed in	Source
6.3	≥ 6.3.0, < 6.3.1	6.3.1	NVD
6.2	≥ 6.2.0, < 6.2.6	6.2.6	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Libreoffice to 6.3.1 · 6.2.6

Advisories and patches

www.libreoffice.orgVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.8read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
CNAweakness (CWE)CWE-116read 2026-10-23
NVDweakness (CWE)CWE-116read 2026-10-23
FIRST EPSSEPSS score3.1 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2019-09-27
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-9853?

Is CVE-2019-9853 actively exploited?

Active exploitation of CVE-2019-9853 has not been confirmed. Its EPSS score was 3.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-9853?

CVE-2019-9853 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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