{"id":"CVE-2020-35843","aliases":["EUVD-2020-23498","GHSA-53rm-5h2m-g3vh"],"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+0x956e.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00758,"percentile":0.55534,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2021-01-25T19:07:32Z","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-2020-35843"},{"url":"https://github.com/advisories/GHSA-53rm-5h2m-g3vh"}],"sources":{"cve":[{"id":"CVE-2020-35843","description":"FastStone Image Viewer 7.5 has an out-of-bounds write (via a crafted image file) at FSViewer.exe+0x956e.","status":"published","published":"2021-01-25T19:07:32Z","modified":"2024-08-04T17:16:12.498Z","updated_at":"2026-11-02T14:35:57.67317Z"}],"euvd":[{"id":"EUVD-2020-23498","description":"FastStone Image Viewer 7.5 has an out-of-bounds write (via a crafted image file) at FSViewer.exe+0x956e.","status":"published","published":"2021-01-25T19:07:32Z","modified":"2024-08-04T17:16:12Z","updated_at":"2026-11-03T03:07:05.241494Z"}],"ghsa":[{"id":"GHSA-53rm-5h2m-g3vh","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+0x956e.","status":"published","published":"2022-05-24T17:40:14Z","modified":"2023-01-29T05:06:15Z","cwes":["CWE-787"],"updated_at":"2026-11-02T14:45:59.056416Z"}],"nvd":[{"id":"CVE-2020-35843","description":"FastStone Image Viewer 7.5 has an out-of-bounds write (via a crafted image file) at FSViewer.exe+0x956e.","status":"published","published":"2021-01-26T18:15:54.85Z","modified":"2026-06-17T03:14:26.843Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:06:30.596418Z"}]}}