UpHeron
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Servers and applications

CVE-2020-26099

cPanel before 88.0.3 allows attackers to bypass the SMTP greylisting protection mechanism (SEC-491).

Severity
High 7.5
Published
25 Sept 2020
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
88.0.3
Sources
NVD

Affected software

SoftwareAffected versions
cPanel & WHMServers and applications · cpe:a:cpanel:cpanel
  • Every version before 88.0.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-26099
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-26099