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CVE-2021-33897

21
FAUCET Score

CVE-2021-33897 describes two vulnerabilities in Synthesia: a buffer overflow in versions prior to 10.7.5567 when using a non-Latin locale, and improper path handling in versions prior to 10.9. Both allow user-assisted or local attackers to cause a denial of service (application crash) through crafted MIDI files. With a CVSS score of 5.5 (Medium), successful exploitation requires user interaction (UI:R) or local access (AV:L), leading to high availability impact (A:H) but no confidentiality or integrity compromise. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion, indicating a low current threat level.

Impacted Technologies

VendorProductVersion(s)CPE
<= 10.8CPE matchmatch criteria
cpe:2.3:a:synthesiagame:synthesia:*:*:*:*:*:*:*:*

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
0.23%
Probability of exploitation in next 30 days
EPSS Percentile
13.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0023 is in the 17th percentile among its peer group of 5,765 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

isopach.dev / CVE-2021-33897
Third Party Advisory
synthesiagame.com / news
Release NotesVendor Advisory