What’s Vulnerable › Vulnerabilities

CVE-2018-6535

• Severity: high (CVSS 8.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-02-27 · updated 2026-06-17

Description

An issue was discovered in Icinga 2.x through 2.8.1. The lack of a constant-time password comparison function can disclose the password to an attacker.

Affected products

• icinga2: from 2.0.0 through 2.8.1

References

• https://github.com/Icinga/icinga2/issues/4920
• https://github.com/Icinga/icinga2/pull/5715
• https://github.com/Icinga/icinga2/issues/4920
• https://github.com/Icinga/icinga2/pull/5715

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