CVE-2021-26237

Description

FastStone Image Viewer <= 7.5 is affected by a user mode write access violation at 0x00402d7d, triggered when a user opens or views a malformed CUR file that is mishandled by FSViewer.exe. Attackers could exploit this issue for a Denial of Service (DoS) or possibly to achieve code execution.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.20%
Third-Party Advisory voidsec.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://voidsec.com/advisories/cve-2021-26237-faststone-image-viewer-v-7-5-user-mode-write-access-violation/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-26237?
CVE-2021-26237 has been scored as a high severity vulnerability.
How to fix CVE-2021-26237?
To fix CVE-2021-26237, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-26237 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-26237 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.