CVE-2021-40345 in the critical feed json
An issue was discovered in Nagios XI 5.8.5.
published 2021-10-26 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-27524
- cvss
- 7.2
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 22.7%
- EPSS 22.7% chance of exploitation in 30 days, percentile 97%
- public exploits
- 0
- none known
Summary
An issue was discovered in Nagios XI 5.8.5. In the Manage Dashlets section of the Admin panel, an administrator can upload ZIP files. A command injection (within the name of the first file in the archive) allows an attacker to execute system commands.
Exploit prediction
22.69% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/ArianeBlow/NagiosXI-EmersonFI/blob/main/README.md referenced PoC, tagged "exploit" by a source, unverified
- synacktiv.com https://www.synacktiv.com/sites/default/files/2021-10/Nagios_XI_multiple_vulnerabilities_0.pdf referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.0 | AV:N/AC:L/Au:S/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-77 Improper Neutralization of Special Elements used in a Command
References
-
github.com
/ArianeBlow/NagiosXI-EmersonFI/blob/main/README.md
exploit, third-party-advisory
-
synacktiv.com
/sites/default/files/2021-10/Nagios_XI_multiple_vulnerabilities_0.pdf
exploit, third-party-advisory
-
assets.nagios.com
/downloads/nagiosxi/CHANGES-5.TXT
release-notes, vendor-advisory
-
synacktiv.com
not-applicable
Sources
- CVE List CVE-2021-40345
- NVD CVE-2021-40345
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