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Vulnerability record · CVE-2022-26562 · published 1 April 2022

CVE-2022-26562: Kopano groupware core improper authentication vulnerability

Kopano · Groupware Core

An issue in provider/libserver/ECKrbAuth.cpp of Kopano Core <= v11.0.2.51 contains an issue which allows attackers to authenticate even if the user account or password is expired. It also exists in the predecessor Zarafa Collaboration Platform (ZCP) in provider/libserver/ECPamAuth.cpp of Zarafa >= 6.30 (introduced between 6.30.0 RC1e and 6.30.8 final).

9.8 CVSS 3.1 Critical EPSS 2.2% · top 18.6% CWE-287 · Improper authentication
9.8CVSS 3.1 base score, v2 7.5
2.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
16References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue in provider/libserver/ECKrbAuth.cpp of Kopano Core <= v11.0.2.51 contains an issue which allows attackers to authenticate even if the user account or password is expired. It also exists in the predecessor Zarafa Collaboration Platform (ZCP) in provider/libserver/ECPamAuth.cpp of Zarafa >= 6.30 (introduced between 6.30.0 RC1e and 6.30.8 final).

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2023-342b96903b
https://bugzilla.redhat.com/show_bug.cgi?id=2192126
https://github.com/Kopano-dev/kopano-core/blob/master/provider/libserver/ECKrbAuth.cpp#L137
https://jira.kopano.io/browse/KC-2021
https://kopano.com/ Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/03/msg00006.html
https://src.fedoraproject.org/rpms/zarafa/c/a5a8366ccf07f248fae6edffb5123cfda579bfdb?branch=epel7
https://stash.kopano.io/projects/KC/repos/kopanocore/browse/provider/libserver/ECKrbAuth.cpp#137 ExploitVendor Advisory
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2023-342b96903b
https://bugzilla.redhat.com/show_bug.cgi?id=2192126
https://github.com/Kopano-dev/kopano-core/blob/master/provider/libserver/ECKrbAuth.cpp#L137
https://jira.kopano.io/browse/KC-2021
https://kopano.com/ Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/03/msg00006.html
https://src.fedoraproject.org/rpms/zarafa/c/a5a8366ccf07f248fae6edffb5123cfda579bfdb?branch=epel7
https://stash.kopano.io/projects/KC/repos/kopanocore/browse/provider/libserver/ECKrbAuth.cpp#137 ExploitVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-26562), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.