CVE-2020-23894 json
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…
published 2021-11-10 4 y ago modified 2026-06-17 4 mo ago also EUVD-2020-16631
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
0.56% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
wildbit-soft.fi
/software.html
product
-
github.com
/Aurorainfinity/vulnerabilities/blob/master/WildBit_Viewer/tiff_file_format.md
third-party-advisory
Sources
- CVE List CVE-2020-23894
- NVD CVE-2020-23894
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.