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CVE-2021-21772

28
FAUCET Score

CVE-2021-21772 is a high-severity use-after-free vulnerability in the 3MF Consortium lib3mf 2.0.0, affecting various distributions including Debian and Fedora. An unauthenticated attacker can achieve remote code execution by providing a specially crafted 3MF file. The vulnerability has a CVSS score of 8.1, indicating high impact on confidentiality, integrity, and availability, with high attack complexity. There is currently no evidence of active exploitation, nor are there public exploits available in Metasploit or ExploitDB, and community discussion is minimal.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.0CPE matchmatch criteria
cpe:2.3:a:3mf:lib3mf:2.0.0:-:*:*:*:*:*:*
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:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.17%
Probability of exploitation in next 30 days
EPSS Percentile
89.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0417 is in the 54th percentile among its peer group of 8,918 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 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

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/IHMMHD2EOMIVJ7EKZTJJMX4C7E6ZRWDL
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/NPBS642OYVA6DUKK3HZHEINVWEDZSMEU
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/WDGGB65YBQL662M3MOBNNJJNRNURW4TG
security.gentoo.org / glsa/202208-01
Third Party Advisory
talosintelligence.com / vulnerability_reports/TALOS-2020-1226
ExploitThird Party Advisory
debian.org / security/2021/dsa-4887
Third Party Advisory
talosintelligence.com / vulnerability_reports/TALOS-2021-1226
ExploitThird Party Advisory