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Fencer Vulns
high 8.1

CVE-2018-6535 json

An issue was discovered in Icinga 2.x through 2.8.1.

published 2018-02-27 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-18287

cvss
8.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

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.

Patch / fix

  • icinga2 Debian 14, Debian 13, Debian 12 2.8.4-1

debian advisories DEBIAN-CVE-2018-6535

  • icinga2 Alpine 3.7 2.8.2-r0

alpine advisories ALPINE-CVE-2018-6535

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Exploit prediction

1.33% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.