How severe is CVE-2019-19907?

CVE-2019-19907 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-19907 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-19907?

CVE-2019-19907 affects Kopano Groupware Core. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-19907?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-19907 published?

CVE-2019-19907 was published on 2019-12-19 and last updated on 2026-06-17.

CVE-2019-19907

CVE-2019-19907 is a critical-severity vulnerability in Kopano Groupware Core with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Kopano Groupware Core
Published: 2019-12-19
Last modified: 2026-06-17

Description

HrAddFBBlock in libfreebusy/freebusyutil.cpp in Kopano Groupware Core before 8.7.7 allows out-of-bounds access, as demonstrated by mishandling of an array copy during parsing of ICal data.

Frequently asked questions

What is CVE-2019-19907?: HrAddFBBlock in libfreebusy/freebusyutil.cpp in Kopano Groupware Core before 8.7.7 allows out-of-bounds access, as demonstrated by mishandling of an array copy during parsing of ICal data.
How severe is CVE-2019-19907?: CVE-2019-19907 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-19907 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-19907?: CVE-2019-19907 affects Kopano Groupware Core. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-19907?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-19907 published?: CVE-2019-19907 was published on 2019-12-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kopano:groupware_core:*:*:*:*:*:*:*:*

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