CVE-2026-121517
mediumA vulnerability was detected in IrfanView 4.76.0.0 on Win64.
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".
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/dwBruijn/CVEs/blob/main/IrfanView/TIFF/Tiff_Wang.md cna@vuldb.com
- https://vuldb.com/cve/CVE-2026-121517 cna@vuldb.com
- https://vuldb.com/submit/1018543 cna@vuldb.com
- https://vuldb.com/vuln/430288 cna@vuldb.com
- https://vuldb.com/vuln/430288/cti cna@vuldb.com
- https://www.irfanview.com/ cna@vuldb.com