CVE-2012-4791

Exchange Server vulnerability

CVSS

3.5

EPSS

13.4%

EPSS pct

96th

Exploited

No known

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."

Affected vendor

Microsoft

Affected product

Exchange Server

CVSS vector

AV:N/AC:M/Au:S/C:N/I:N/A:P

Weakness type (CWE)

CWE-94 — Code Injection

Published

2012-12-12

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring single-factor authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 13.4% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2012-4791

Confirm whether Microsoft Exchange Server is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2012-4791.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2012-4791

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2012-4791 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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