What is CVE-2022-26562?

An issue in provider/libserver/ECKrbAuth.cpp of Kopano Core = 6.30 (introduced between 6.30.0 RC1e and 6.30.8 final).

How severe is CVE-2022-26562?

CVE-2022-26562 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-2022-26562 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-2022-26562?

CVE-2022-26562 affects Kopano Groupware Core. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-26562?

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-2022-26562 published?

CVE-2022-26562 was published on 2022-04-01 and last updated on 2026-06-17.

CVE-2022-26562

CVE-2022-26562 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-287.

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-287
Affected product: Kopano Groupware Core
Published: 2022-04-01
Last modified: 2026-06-17

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).

Frequently asked questions

What is CVE-2022-26562?: 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).
How severe is CVE-2022-26562?: CVE-2022-26562 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-2022-26562 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-2022-26562?: CVE-2022-26562 affects Kopano Groupware Core. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-26562?: 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-2022-26562 published?: CVE-2022-26562 was published on 2022-04-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kopano:groupware_core:11.0.2.51:*:*:*:*:*:*:*

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