What is CVE-2021-28153?

CVE-2021-28153 is a medium-severity vulnerability in Broadcom Brocade Fabric Operating System Firmware, classified under Improper Link Resolution Before File Access. CVSS score: 5.3/10. Published 2021-03-11.

How severe is CVE-2021-28153?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2021-28153 known to be exploited?

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

Vulnerability in Broadcom Brocade Fabric Operating System Firmware

CVE-2021-28153

An issue was discovered in GNOME GLib before 2.66.8. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION to replace a path that is a dangling symlink, it incorrectly also creates the target of the symlink as an empty file, which could conceivably have security relevance if the symlink is attacker-controlled. (If the path is a symlink to a file that already exists, then the contents of that file correctly remain unchanged.)

Published 2021-03-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.026 (84.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000

Affected products

Broadcom Brocade Fabric Operating System Firmware
GNOME Glib
Debian Linux — versions 9.0
Fedoraproject Fedora — versions 33

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

Public proof-of-concept exploits

References

gitlab.gnome.org/GNOME/glib/-/issues/2325 (Exploit, Patch, Issue Tracking, Vendor Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
security.netapp.com/advisory/ntap-20210416-0003/ (Third Party Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
security.gentoo.org/glsa/202107-13 (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2022/06/msg00006.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-28153?: CVE-2021-28153 is a medium-severity vulnerability in Broadcom Brocade Fabric Operating System Firmware, classified under Improper Link Resolution Before File Access. CVSS score: 5.3/10. Published 2021-03-11.
How severe is CVE-2021-28153?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2021-28153 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.