What is CVE-2021-21440?

CVE-2021-21440 is a medium-severity vulnerability in Otrs, classified under Information Disclosure. CVSS score: 5.2/10. Published 2021-07-26.

How severe is CVE-2021-21440?

Medium severity. CVSS v3 base score is 5.2 out of 10.

Information disclosure in Otrs

CVE-2021-21440

Generated Support Bundles contains private S/MIME and PGP keys if containing folder is not hidden. This issue affects: OTRS AG ((OTRS)) Community Edition 6.0.x version 6.0.1 and later versions. OTRS AG OTRS 7.0.x version 7.0.27 and prior versions; 8.0.x version 8.0.14 and prior versions.

Vulnerability class: Information Disclosure

Published 2021-07-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.2 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: -0.000

Affected products

Otrs
Otrs Ag — versions 7.0.x, 8.0.x
Otrs Ag ((Otrs)) Community Edition — versions 6.0.1

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

otrs.com/release-notes/otrs-security-advisory-2021-10/ (Vendor Advisory)
lists.debian.org/debian-lts-announce/2023/08/msg00040.html (mailing-list)

Frequently asked questions

What is CVE-2021-21440?: CVE-2021-21440 is a medium-severity vulnerability in Otrs, classified under Information Disclosure. CVSS score: 5.2/10. Published 2021-07-26.
How severe is CVE-2021-21440?: Medium severity. CVSS v3 base score is 5.2 out of 10.