Low severity · published Sep 14, 2026
CVE-2023-24035
An issue was discovered in Nagios XI before 5.9.3
3.5
CVSS
0.7%
EPSS
No
On KEV
Description
An issue was discovered in Nagios XI before 5.9.3. The is_insecure_login_authenticated function uses a insecure timing comparison that leads to an attacker being able to bruteforce the admin password, by measuring timing differences in the comparison.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NX
Nagios XI · Nagios
before 5.9.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-24035
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-24035
www.nagios.com
https://www.nagios.com/downloads/nagios-xi/change-log/
www.nagios.com
https://www.nagios.com/security-disclosures/
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