CVE-2020-12784Network attack vector

Unauthenticated bandwidth suspension via mail log strings

Published May 11, 2020 · Updated Aug 4, 2024

Bandwidth-accounting flaw in cPanel before 86.0.14 allows remote attackers to suspend an account via crafted mail-log strings. cPanel has not published which mail-log parser or wrong operation causes those strings to trigger bandwidth suspension. No authentication or user interaction is required, and the documented consequence is account bandwidth suspension rather than data access or modification.

CVSS severity5.3
Medium
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Bandwidth-accounting flaw in cPanel before 86.0.14 allows remote attackers to suspend an account via crafted mail-log strings. cPanel has not published which mail-log parser or wrong operation causes those strings to trigger bandwidth suspension. No authentication or user interaction is required, and the documented consequence is account bandwidth suspension rather than data access or modification.

The record

CVE
CVE-2020-12784
Published
May 11, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1498
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.0NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1498Network Denial of Service

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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