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CVE-2018-6641

33
FAUCET Score

CVE-2018-6641 is a critical arbitrary free vulnerability affecting Design Science MathType 6.9c, which can lead to remote code execution. Attackers can exploit this by crafting malicious input to overwrite a structure, causing a function call with an invalid parameter and subsequent freeing of critical data. With a CVSS score of 9.8 (CRITICAL), this vulnerability is remotely exploitable with low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. While there are no known public exploits or active exploitation, the vulnerability has garnered significant community discussion, indicating awareness among security researchers. The issue is resolved in MathType 6.9d.

Impacted Technologies

VendorProductVersion(s)CPE
6.9cCPE matchmatch criteria
cpe:2.3:a:wiris:mathtype:6.9c:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.59%
Probability of exploitation in next 30 days
EPSS Percentile
92.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0559 is in the 86th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 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 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

drive.google.com / open
ExploitThird Party Advisory
dessci.com / en/dl
ProductVendor Advisory