Is CVE-2012-4791 in the CISA KEV catalog?

No. CVE-2012-4791 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2012-4791?

CVE-2012-4791 has a CVSS v2 base score of 3.5 (LOW).

What is the EPSS score for CVE-2012-4791?

CVE-2012-4791 has an EPSS score of 13.44% (96th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2012-4791

LOWEPSS 96th pctl

3.5

CVSS v2

NVD

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."

CWE-94Code Injection

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

13.44%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

http://www.securityfocus.com/bid/56836
http://www.us-cert.gov/cas/techalerts/TA12-346A.html
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-080
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16158

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.