Irfanview : Security Vulnerabilities, CVEs, Published In 2009

Integer overflow in IrfanView 4.23, when the resampling or screen fitting option is enabled, allows remote attackers to execute arbitrary code via a crafted TIFF 1 BPP image, which triggers a heap-based buffer overflow.

Integer overflow in the FORMATS Plugin before 4.23 for IrfanView allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a large XPM file that triggers a heap-based buffer overflow.