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CVE-2022-26562

An issue in provider/libserver/ECKrbAuth.cpp of Kopano-Core v11.0.2.51 contains an issue which...

9.8 CriticalFix available

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).

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

2.15%Up 1.3 points since Apr 2, 2022
90%50%10%1%

What each source reports

NVD Score used 9.8

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).

Record
CVE-2022-26562
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-287
Updated
2026-11-02
CVE List No score

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).

Record
CVE-2022-26562
Updated
2026-11-02
EUVDEUVD-2022-31118 No score

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).

Record
EUVD-2022-31118
Updated
2026-11-03
GitHub AdvisoriesGHSA-24g4-fh3x-4f5h 9.8

An issue in provider/libserver/ECKrbAuth.cpp of Kopano-Core v11.0.2.51 contains an issue which...

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.

Record
GHSA-24g4-fh3x-4f5h
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-287
Updated
2026-11-02
OSVUBUNTU-CVE-2022-26562 9.8

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).

Record
UBUNTU-CVE-2022-26562
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUSN-6876-1 No score

kopanocore vulnerabilities

It was discovered that Kopano Core allowed out-of-bounds access. An attacker could use this issue to expose private information. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-19907)

It was discovered that Kopano Core allowed possible authentication with expired passwords. An attacker could use this issue to bypass authentication. (CVE-2022-26562)

Record
USN-6876-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
kopanocore
Debian:10
From an advisory covering 2 CVEs
 before 8.7.0-3+deb10u1, plus listed versions
8.7.0-3
8.7.0-3+deb10u1
kopanocore
Ubuntu:Pro:18.04:LTS
 before 8.5.5-0ubuntu1+esm1, plus listed versions
8.1.0-3ubuntu58.1.0-3ubuntu68.3.4-4ubuntu48.5.2-1ubuntu18.5.5-0ubuntu1
8.5.5-0ubuntu1+esm1
kopanocore
Ubuntu:20.04:LTS
 before 8.7.0-7ubuntu1.1, plus listed versions
8.7.0-3build28.7.0-5ubuntu58.7.0-5ubuntu68.7.0-6ubuntu18.7.0-6ubuntu28.7.0-6ubuntu38.7.0-7ubuntu1
8.7.0-7ubuntu1.1
kopanocore
Ubuntu:22.04:LTS
 before 8.7.0-7.1ubuntu10.1, plus listed versions
8.7.0-7.1ubuntu48.7.0-7.1ubuntu68.7.0-7.1ubuntu78.7.0-7.1ubuntu88.7.0-7.1ubuntu10
8.7.0-7.1ubuntu10.1
kopanocore
Ubuntu:Pro:18.04:LTS
From an advisory covering 2 CVEs
 before 8.5.5-0ubuntu1+esm1, plus listed versions
8.1.0-3ubuntu58.1.0-3ubuntu68.3.4-4ubuntu48.5.2-1ubuntu18.5.5-0ubuntu1
8.5.5-0ubuntu1+esm1
kopanocore
Ubuntu:20.04:LTS
From an advisory covering 2 CVEs
 before 8.7.0-7ubuntu1.1, plus listed versions
8.7.0-3build28.7.0-5ubuntu58.7.0-5ubuntu68.7.0-6ubuntu18.7.0-6ubuntu28.7.0-6ubuntu38.7.0-7ubuntu1
8.7.0-7ubuntu1.1
kopanocore
Ubuntu:22.04:LTS
From an advisory covering 2 CVEs
 before 8.7.0-7.1ubuntu10.1, plus listed versions
8.7.0-7.1ubuntu48.7.0-7.1ubuntu68.7.0-7.1ubuntu78.7.0-7.1ubuntu88.7.0-7.1ubuntu10
8.7.0-7.1ubuntu10.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-26562 is a critical vulnerability (CVSS 9.8) in Kopano Groupware Core, published April 1, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.15%, the 82nd percentile. Fixed in kopanocore 8.5.5-0ubuntu1+esm1.

References

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