How severe is CVE-2009-0098?

CVE-2009-0098 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-0098 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 25% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0098?

CVE-2009-0098 primarily affects Microsoft Exchange Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0098?

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-2009-0098 published?

CVE-2009-0098 was published on 2009-02-10 and last updated on 2026-06-16.

CVE-2009-0098

CVE-2009-0098 is a critical-severity vulnerability in Microsoft Exchange Server with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 25% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 25% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Microsoft Exchange Server
Published: 2009-02-10
Last modified: 2026-06-16

Description

Microsoft Exchange 2000 Server SP3, Exchange Server 2003 SP2, and Exchange Server 2007 SP1 do not properly interpret Transport Neutral Encapsulation (TNEF) properties, which allows remote attackers to execute arbitrary code via a crafted TNEF message, aka "Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2009-0098?: Microsoft Exchange 2000 Server SP3, Exchange Server 2003 SP2, and Exchange Server 2007 SP1 do not properly interpret Transport Neutral Encapsulation (TNEF) properties, which allows remote attackers to execute arbitrary code via a crafted TNEF message, aka "Memory Corruption Vulnerability."
How severe is CVE-2009-0098?: CVE-2009-0098 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-0098 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 25% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0098?: CVE-2009-0098 primarily affects Microsoft Exchange Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0098?: 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-2009-0098 published?: CVE-2009-0098 was published on 2009-02-10 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:microsoft:exchange_server:2000:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2003:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2007:sp1:*:*:*:*:*:*

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