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CVE-2020-6620

27
FAUCET Score

CVE-2020-6620 is a high-severity heap-based buffer over-read vulnerability affecting the stb_truetype.h library up to version 1.22. This flaw, rated 8.8 CVSSv3, allows unauthenticated attackers to achieve high impact on confidentiality, integrity, and availability through low-complexity network attacks requiring user interaction. While no public exploits, Metasploit modules, or Nuclei templates are currently available, and there's minimal community discussion or media coverage, its high CVSS score indicates significant potential risk.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.22CPE matchmatch criteria
cpe:2.3:a:nothings:stb_truetype.h:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.14%
Probability of exploitation in next 30 days
EPSS Percentile
63.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0114 is in the 62nd percentile among its peer group of 14,855 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 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 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / nothings/stb/issues/868
ExploitThird Party Advisory