CVE-2021-3800

Exp

A flaw was found in glib before version 2.63.6. Due to random charset alias, pkexec can leak content from files owned by privileged users to unprivileged ones under the right condition.

Published: 2022-08-23 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-3800 is rated Exploit Available (51.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.53%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-3800

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-3800

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.06% 0.53% +0.47%
2 2025-11-21 0.27% 0.06% -0.22%
3 2025-11-18 — 0.27% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-3800

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.8 3.6 [email protected]

Weakness enumeration for CVE-2021-3800

OS Trackers for CVE-2021-3800

vendor priority summary link
alpine high CVE-2021-3800: 1 source package rows (glib); 10 state rows across 5 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 0, open 10. https://security.alpinelinux.org/vuln/CVE-2021-3800
debian not yet assigned CVE-2021-3800 not yet assigned priority: Debian including 1 source packages (glib2.0), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2021-3800
redhat medium — https://access.redhat.com/security/cve/CVE-2021-3800
suse medium — https://www.suse.com/security/cve/CVE-2021-3800/
ubuntu medium CVE-2021-3800 medium priority: Ubuntu including 1 source packages (glib2.0), 7 status rows across 7 suites (bionic, focal, hirsute, impish, trusty, upstream, xenial): released 4, not-affected 3. https://ubuntu.com/security/CVE-2021-3800

Affected software / configurations for CVE-2021-3800

Vendor Product Version Raw CPE
gnome glib < 2.62.5 cpe:2.3:a:gnome:glib:*:*:*:*:*:*:*:*
gnome glib >= 2.63.0, < 2.63.6 cpe:2.3:a:gnome:glib:*:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
netapp active_iq_unified_manager — cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*

References for CVE-2021-3800

cvelogic Threat Intelligence