CVE-2016-9566

highpriority · track · 43EPSS 0.049 · 92 %ileexploit · functionalDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

4.88% (92nd) EPSS

CVSS 7.2 · high

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

base/logging.c in Nagios Core before 4.2.4 allows local users with access to an account in the nagios group to gain root privileges via a symlink attack on the log file. NOTE: this can be leveraged by remote attackers using CVE-2016-9565.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v3.07.8highCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.07.4highCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-264USprimaryCWE-59USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-40921Nagios < 4.2.4 - Local Privilege Escalationfunctional · exploit_db

affected products (6)

Products and version ranges known to be affected.

Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat OpenStackall versionscert_bundDEcpe:/a:redhat:openstack:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
n/a n/a≤ n/aenisa_euvdEU
nagios nagios≤ 4.2.3nvdUScpe:2.3:a:nagios:nagios:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-1103Nagios: Mehrere SchwachstellenDeutsch2016-12-15csaf · cert_bundDE
Ein entfernter Angreifer kann mehrere Schwachstellen in Nagios ausnutzen, um Dateien zu manipulieren und um root Rechte zu erlangen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2016-12-15modified 2026-06-17

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+11266 more

references (38)

External citations — patches, advisories, analysis.

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