CVE-2021-26235

moderate-risk
Published 2021-03-18

FastStone Image Viewer <= 7.5 is affected by a user mode write access violation near NULL at 0x005bdfc9, 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.

Do I need to act?

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0.32% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Faststone

References (2)

Third Party Advisory https://voidsec.com/advisories/cve-2021-26235-faststone-image-viewer-v-7-5-user-...
Third Party Advisory https://voidsec.com/advisories/cve-2021-26235-faststone-image-viewer-v-7-5-user-...
30
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal