CVE-2026-55783

NanaZip (a 7‑Zip derivative) is affected prior to version 6.5.1749.0. The in‑house IInArchive handlers in NanaZip.Codecs dereference the caller‑supplied Indices array during Extract when Indices is NULL and NumItems is 0xFFFFFFFF, in the code path for a full archive extraction (Test or Extract al...

CVE-2026-55783 NanaZip: NULL pointer dereference in Extract() of all seven NanaZip custom archive handlers when extracting/testing the whole archive

NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's seven in-house IInArchive handlers in NanaZip.Codecs unconditionally dereference the caller-supplied Indices array inside Extract when the archive engine signals extract everything by passin...

PT-2026-57238

NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's seven in-house IInArchive handlers in NanaZip.Codecs unconditionally dereference the caller-supplied Indices array inside Extract when the archive engine signals extract everything by passin...