What is CVE-2013-5571?

CVE-2013-5571 is a medium-severity vulnerability in Hmailserver, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.9/10. Published 2020-01-07.

How severe is CVE-2013-5571?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Buffer overflow in Hmailserver

CVE-2013-5571

HMailServer 5.3.x and prior: Memory Corruption which could cause DOS

Vulnerability class: Buffer Overflow

Published 2020-01-07 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (57.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Hmailserver

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.securiteam.com/securitynews/5QP3O0UAKA.html (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2013-5571?: CVE-2013-5571 is a medium-severity vulnerability in Hmailserver, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.9/10. Published 2020-01-07.
How severe is CVE-2013-5571?: Medium severity. CVSS v3 base score is 5.9 out of 10.