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CVE-2021-40111

23
FAUCET Score

CVE-2021-40111 is a Denial of Service (DoS) vulnerability affecting Apache James versions prior to 3.6.1. Crafted APPEND and STATUS IMAP commands can trigger infinite loops, leading to high CPU utilization and OutOfMemory exceptions. This vulnerability has a CVSS score of 6.5 (Medium), requiring an authenticated IMAP user for exploitation. There is currently no public exploit code, nor is there evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.6.1CPE matchmatch criteria
cpe:2.3:a:apache:james:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.12%
Probability of exploitation in next 30 days
EPSS Percentile
80.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0212 is in the 92nd percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: org.apache.james:james-serverFixed in: 3.6.1

Vendor Advisories (1)

mavenGHSA-fqgw-6qj5-8hmpmedium

Infinite Loop in Apache James

Jan 8, 2022

References

openwall.com / lists/oss-security/2022/01/04/3
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2022/01/04/3
Mailing ListThird Party Advisory