CVE-2013-5571Network attack vector

Unauthenticated service interruption via memory corruption

Published Jan 7, 2020 · Updated Aug 6, 2024

Memory corruption in hMailServer 5.3.4 and earlier allows remote attackers to interrupt the mail service through network requests. The public CVE record and its sole historical advisory reference do not identify the affected protocol, parser, request shape, or erroneous memory operation. Exploitation requires no authentication or user interaction, and the documented consequence is denial of service; public sources do not state whether the service crashes, hangs, or restarts.

CVSS severity5.9
Medium
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in hMailServer 5.3.4 and earlier allows remote attackers to interrupt the mail service through network requests. The public CVE record and its sole historical advisory reference do not identify the affected protocol, parser, request shape, or erroneous memory operation. Exploitation requires no authentication or user interaction, and the documented consequence is denial of service; public sources do not state whether the service crashes, hangs, or restarts.

The record

CVE
CVE-2013-5571
Published
Jan 7, 2020
Updated
Aug 6, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-119, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

2.6NIST NVDAV:N/AC:H/Au:N/C:N/I:N/A:P
5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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