How severe is CVE-2008-0858?

CVE-2008-0858 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2008-0858 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-0858?

CVE-2008-0858 primarily affects Kerio Kerio Mailserver. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-0858?

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

When was CVE-2008-0858 published?

CVE-2008-0858 was published on 2008-02-21 and last updated on 2026-06-16.

CVE-2008-0858

CVE-2008-0858 is a high-severity vulnerability in Kerio Kerio Mailserver with a CVSS 2.0 base score of 7.5. 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-94.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Kerio Kerio Mailserver
Published: 2008-02-21
Last modified: 2026-06-16

Description

Buffer overflow in the Visnetic anti-virus plugin in Kerio MailServer before 6.5.0 might allow remote attackers to execute arbitrary code via unspecified vectors.

Frequently asked questions

What is CVE-2008-0858?: Buffer overflow in the Visnetic anti-virus plugin in Kerio MailServer before 6.5.0 might allow remote attackers to execute arbitrary code via unspecified vectors.
How severe is CVE-2008-0858?: CVE-2008-0858 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2008-0858 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-0858?: CVE-2008-0858 primarily affects Kerio Kerio Mailserver. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-0858?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2008-0858 published?: CVE-2008-0858 was published on 2008-02-21 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:kerio:kerio_mailserver:*:*:*:*:*:*:*:*
cpe:2.3:a:visnetic:visnetic_antivirus_plug-in_for_mail_server:*:*:*:*:*:*:*:*

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CVE-2008-0860 — Critical (CVSS 10.0): Unspecified vulnerability in the AVG plugin in Kerio MailServer before 6.5.0 has unspecified impact via unknown remote…
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CVE-2004-2441 — Critical (CVSS 10.0): Unspecified vulnerability in Kerio MailServer before 6.0.3 has unknown impact and unknown remote attack vectors,…
CVE-2006-1158 — High (CVSS 7.8): Kerio MailServer before 6.1.3 Patch 1 allows remote attackers to cause a denial of service (application crash) via a…
CVE-2005-1062 — High (CVSS 7.5): The administration protocol for Kerio WinRoute Firewall 6.x up to 6.0.10, Personal Firewall 4.x up to 4.1.2, and…
CVE-2003-0487 — High (CVSS 7.5): Multiple buffer overflows in Kerio MailServer 5.6.3 allow remote authenticated users to cause a denial of service and…

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