How severe is CVE-2006-2055?

CVE-2006-2055 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2006-2055 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-2055?

CVE-2006-2055 affects Microsoft Outlook. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2006-2055?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2006-2055 published?

CVE-2006-2055 was published on 2006-04-26 and last updated on 2026-06-16.

CVE-2006-2055

CVE-2006-2055 is a medium-severity vulnerability in Microsoft Outlook with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-88.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 15% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-88
Affected product: Microsoft Outlook
Published: 2006-04-26
Last modified: 2026-06-16

Description

Argument injection vulnerability in Microsoft Outlook 2003 SP1 allows user-assisted remote attackers to modify command line arguments to an invoked mail client via " (double quote) characters in a mailto: scheme handler, as demonstrated by launching Microsoft Outlook with an arbitrary filename as an attachment. NOTE: it is not clear whether this issue is implementation-specific or a problem in the Microsoft API.

Frequently asked questions

What is CVE-2006-2055?: Argument injection vulnerability in Microsoft Outlook 2003 SP1 allows user-assisted remote attackers to modify command line arguments to an invoked mail client via " (double quote) characters in a mailto: scheme handler, as demonstrated by launching Microsoft Outlook with an arbitrary filename as an attachment. NOTE: it is not clear whether this issue is implementation-specific or a problem in the Microsoft API.
How severe is CVE-2006-2055?: CVE-2006-2055 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2006-2055 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-2055?: CVE-2006-2055 affects Microsoft Outlook. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-2055?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-2055 published?: CVE-2006-2055 was published on 2006-04-26 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:microsoft:outlook:2003:sp1:*:*:*:*:*:*

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