Strix
26.1K

CVE-2021-26235

HIGHCVSS 7.8/10EPSS 1.06%

Last modified

CVE-2021-26235 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 1.06% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.8/10

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

EPSS Probability
1.06%

60.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
FaststoneImage Viewer<= 7.5

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-26235?
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.
How severe is CVE-2021-26235?
CVE-2021-26235 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.06% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26235?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26235?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST