No VulnCrest analysis published for this CVE yet. Below is the original CNA/NVD description, unmodified.
Description
A vulnerability was detected in IrfanView 4.76.0.0 on Win64. Affected by this vulnerability is an unknown functionality of the component TIFF Wang Annotation Handler. Performing a manipulation results in heap-based buffer overflow. The attack is possible to be carried out remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit is now public and may be used. It is recommended to apply a patch to fix this issue. The vendor confirms: "[T]he TIF-Annotations option is OFF by default. Means, normal users are not affected ... the danger level for this is low".
Exploits & detection
No public PoC or detection template found yet.
Timeline
- Published: 03 Nov 2026
- Last modified upstream: 07 Nov 2026
Sources & licenses
- CVE / CVSS / CWE
- NVD record ↗ (unmodified). This product uses the NVD API but is not endorsed or certified by the NVD. CVE® © The MITRE Corporation.
- Exploitation
- CISA KEV (CC0) · EPSS by FIRST.org
- References used for the analysis
- https://github.com/dwBruijn/CVEs/blob/main/IrfanView/TIFF/Tiff_Wang.md
- https://vuldb.com/cve/CVE-2026-121517
- https://vuldb.com/submit/1018543
- https://vuldb.com/vuln/430288
- https://vuldb.com/vuln/430288/cti
- https://www.irfanview.com/
- https://github.com/dwBruijn/CVEs/blob/main/IrfanView/TIFF/Tiff_Wang.md
- Analysis, summary and remediation
- © VulnCrest