What is CVE-2021-23240?

CVE-2021-23240 is a high-severity vulnerability in NetApp Hci Management Node, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2021-01-12.

How severe is CVE-2021-23240?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2021-23240 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in NetApp Hci Management Node

CVE-2021-23240

selinux_edit_copy_tfiles in sudoedit in Sudo before 1.9.5 allows a local unprivileged user to gain file ownership and escalate privileges by replacing a temporary file with a symlink to an arbitrary file target. This affects SELinux RBAC support in permissive mode. Machines without SELinux are not vulnerable.

Published 2021-01-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.5th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

bugzilla.suse.com/show_bug.cgi (Exploit, Patch, Third Party Advisory, Issue Tracking)
www.sudo.ws/stable.html (Release Notes, Vendor Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
security.gentoo.org/glsa/202101-33 (vendor-advisory, Third Party Advisory)
security.netapp.com/advisory/ntap-20210129-0010/ (Third Party Advisory)
lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a4508… (mailing-list)
lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698… (mailing-list)

Frequently asked questions

What is CVE-2021-23240?: CVE-2021-23240 is a high-severity vulnerability in NetApp Hci Management Node, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2021-01-12.
How severe is CVE-2021-23240?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2021-23240 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.