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CVE-2018-20374

20
FAUCET Score

CVE-2018-20374 describes an out-of-bounds write vulnerability in Tiny C Compiler (TCC) version 0.9.27. Specifically, compiling a specially crafted source file can lead to an 8-byte out-of-bounds write within the use_section1 function in tccasm.c. This vulnerability has a CVSS score of 5.5 (Medium), indicating a local attack vector with low attack complexity, requiring user interaction, and primarily impacting availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
0.9.27CPE matchmatch criteria
cpe:2.3:a:tinycc:tinycc:0.9.27:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

CVSS:3.0/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
3.0

Exploit Intelligence

EPSS Score
0.75%
Probability of exploitation in next 30 days
EPSS Percentile
51.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0075 is in the 58th 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

lists.nongnu.org / archive/html/tinycc-devel/2018-12/msg00015.html
ExploitMailing ListThird Party Advisory