In libdoc through 2019-01-28, calcFileBlockOffset in ole.c allows division by zero.

published 2019-01-29 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-16706

cvss: 6.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.6%; EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

Exploit prediction

1.56% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/uvoteam/libdoc/issues/5 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	6.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-369 Divide By Zero

References

github.com /uvoteam/libdoc/issues/5
exploit, third-party-advisory
securityfocus.com /bid/106813
vdb-entry, third-party-advisory

Sources

CVE List CVE-2019-7156
NVD CVE-2019-7156

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary