{"id":"CVE-2020-35844","aliases":["EUVD-2020-23499","GHSA-36x4-w43w-g9mm"],"status":"published","title":"FastStone Image Viewer 7.5 has an out-of-bounds write (via a crafted image file) at FSViewer.exe...","description":"FastStone Image Viewer 7.5 has an out-of-bounds write (via a crafted image file) at FSViewer.exe+0xbe9c4.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.0093,"percentile":0.60844,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2021-01-25T19:09:47Z","modified":"2026-06-17T03:14:26Z","products":[{"vendor":"faststone","product":"image_viewer"}],"references":[{"url":"https://twitter.com/DmitriyMelikov","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/DmitryMeD/pentesting/blob/main/FastStone%20Image%20Viewer%207.5.md","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-35844"},{"url":"https://github.com/advisories/GHSA-36x4-w43w-g9mm"}],"sources":{"cve":[{"id":"CVE-2020-35844","description":"FastStone Image Viewer 7.5 has an out-of-bounds write (via a crafted image file) at FSViewer.exe+0xbe9c4.","status":"published","published":"2021-01-25T19:09:47Z","modified":"2024-08-04T17:16:12.449Z","updated_at":"2026-11-02T14:35:57.975444Z"}],"euvd":[{"id":"EUVD-2020-23499","description":"FastStone Image Viewer 7.5 has an out-of-bounds write (via a crafted image file) at FSViewer.exe+0xbe9c4.","status":"published","published":"2021-01-25T19:09:47Z","modified":"2024-08-04T17:16:12Z","updated_at":"2026-11-03T03:07:05.241494Z"}],"ghsa":[{"id":"GHSA-36x4-w43w-g9mm","title":"FastStone Image Viewer 7.5 has an out-of-bounds write (via a crafted image file) at FSViewer.exe...","description":"FastStone Image Viewer 7.5 has an out-of-bounds write (via a crafted image file) at FSViewer.exe+0xbe9c4.","status":"published","published":"2022-05-24T17:40:15Z","modified":"2023-01-29T05:05:30Z","cwes":["CWE-787"],"updated_at":"2026-11-02T14:45:48.396935Z"}],"nvd":[{"id":"CVE-2020-35844","description":"FastStone Image Viewer 7.5 has an out-of-bounds write (via a crafted image file) at FSViewer.exe+0xbe9c4.","status":"published","published":"2021-01-26T18:15:54.91Z","modified":"2026-06-17T03:14:26.97Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:06:30.596418Z"}]}}