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CVE-2021-3407

45
FAUCET Score

CVE-2021-3407 is a double free vulnerability in MuPDF version 1.18.0 and related products, which could lead to memory corruption and denial of service. With a CVSS score of 5.5 (Medium), it requires local access and user interaction to exploit, but does not impact confidentiality or integrity. There is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
1.18.0CPE matchmatch criteria
cpe:2.3:a:artifex:mupdf:1.18.0:-:*:*:*:*:*:*
32CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
33CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
50.23%
Probability of exploitation in next 30 days
EPSS Percentile
98.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.5023 is in the 100th percentile among its peer group of 5,758 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

git.ghostscript.com
bugs.ghostscript.com / show_bug.cgi
lists.debian.org / debian-lts-announce/2021/03/msg00012.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/LCADE3VSPWCGTE5BV4KL273R5VK3GDKM
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/M44PNYCBL33OD7GC75XNE6CDS4VSGVWO
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/ZLC6MPH7YS6JPU427XOFRLF3KKZQUZJN
security.gentoo.org / glsa/202105-30
Third Party Advisory