Is CVE-2011-3481 actively exploited?

CVE-2011-3481 has no public evidence of in-the-wild exploitation as of 2026-04-29.

What is the CVSS score for CVE-2011-3481?

CVE-2011-3481 has a CVSS score of 4.3 (UNKNOWN severity). Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P.

How do I patch CVE-2011-3481?

Patch guidance is available from cmu security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2011-3481.

CVE-2011-3481 - remediation guidance & executive summary

Q: Which products are affected by CVE-2011-3481?

40 products: cmu cyrus imap server, cmu cyrus imap server, cmu cyrus imap server, cmu cyrus imap server, cmu cyrus imap server, and 35 more.

Description

The index_get_ids function in index.c in imapd in Cyrus IMAP Server before 2.4.11, when server-side threading is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted References header in an e-mail message.

CVSS Metrics

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector: network
Access Cmplx: medium
Auth: none
Confidentiality: none
Integrity: none
Availability: partial
Weaknesses: NVD-CWE-Other

Metadata

Primary Vendor: CMU
Published: 9/14/2011
Last Modified: 4/29/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

cmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_servercmu : cyrus_imap_server

Remediation Guidance

Executive Summary

View on NIST NVD