How severe is CVE-2012-4791?

CVE-2012-4791 has a CVSS 2.0 base score of 3.5, rated low severity.

Is CVE-2012-4791 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-4791?

CVE-2012-4791 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-2012-4791?

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

When was CVE-2012-4791 published?

CVE-2012-4791 was published on 2012-12-12 and last updated on 2026-06-16.

CVE-2012-4791

CVE-2012-4791 is a low-severity vulnerability in Microsoft Exchange Server with a CVSS 2.0 base score of 3.5. Its EPSS exploit-prediction score of 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: Low (CVSS 2.0 base score 3.5)
EPSS exploit prediction: 13% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Microsoft Exchange Server
Published: 2012-12-12
Last modified: 2026-06-16

Description

Microsoft Exchange Server 2007 SP3 and 2010 SP1 and SP2 allows remote authenticated users to cause a denial of service (Information Store service hang) by subscribing to a crafted RSS feed, aka "RSS Feed May Cause Exchange DoS Vulnerability."

Frequently asked questions

What is CVE-2012-4791?: Microsoft Exchange Server 2007 SP3 and 2010 SP1 and SP2 allows remote authenticated users to cause a denial of service (Information Store service hang) by subscribing to a crafted RSS feed, aka "RSS Feed May Cause Exchange DoS Vulnerability."
How severe is CVE-2012-4791?: CVE-2012-4791 has a CVSS 2.0 base score of 3.5, rated low severity.
Is CVE-2012-4791 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-4791?: CVE-2012-4791 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-2012-4791?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-4791 published?: CVE-2012-4791 was published on 2012-12-12 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:microsoft:exchange_server:2007:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2010:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2010:sp2:*:*:*:*:*:*

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