What’s Vulnerable › Vulnerabilities

CVE-2020-23894

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-10 · updated 2026-06-17
• Weakness: CWE-787

Description

A User Mode Write AV in ntdll!RtlpCoalesceFreeBlocks+0x268 of WildBit Viewer v6.6 allows attackers to cause a denial of service (DoS) via a crafted tiff file.

Affected products

• Wildbit-Soft Wildbit Viewer: 6.6

References

• https://github.com/Aurorainfinity/vulnerabilities/blob/master/WildBit_Viewer/tiff_file_format.md
• https://www.wildbit-soft.fi/software.html
• https://github.com/Aurorainfinity/vulnerabilities/blob/master/WildBit_Viewer/tiff_file_format.md
• https://www.wildbit-soft.fi/software.html

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