{"id":"CVE-2025-8760","state":"PUBLISHED","title":"INSTAR 2K+/4K fcgi_server base64_decode buffer overflow","description":"A vulnerability was identified in INSTAR 2K+ and 4K 3.11.1 Build 1124. This affects the function base64_decode of the component fcgi_server. The manipulation of the argument Authorization leads to buffer overflow. It is possible to initiate the attack remotely.","publishedAt":"2025-08-13T06:14:02.783Z","updatedAt":"2025-08-13T13:31:00.583Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X","source":"VulDB"},"assigner":"VulDB","products":["INSTAR 2K+","INSTAR 4K"],"affected":[{"vendor":"INSTAR","product":"2K+","versions":[{"version":"3.11.1 Build 1124","status":"affected"}],"modules":["fcgi_server"]},{"vendor":"INSTAR","product":"4K","versions":[{"version":"3.11.1 Build 1124","status":"affected"}],"modules":["fcgi_server"]}],"references":["https://vuldb.com/?id.319863","https://vuldb.com/?ctiid.319863","https://modzero.com/static/MZ-25-03_modzero_INSTAR.pdf"],"weaknesses":["CWE-120","CWE-119"],"ingestedAt":"2026-10-29T20:10:04.440Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/8xxx/CVE-2025-8760.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-8760","state":"PUBLISHED","datePublished":"2025-08-13T06:14:02.783Z","dateUpdated":"2025-08-13T13:31:00.583Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2025-08-08T15:37:24.885Z"},"containers":{"cna":{"title":"INSTAR 2K+/4K fcgi_server base64_decode buffer overflow","descriptions":[{"lang":"en","value":"A vulnerability was identified in INSTAR 2K+ and 4K 3.11.1 Build 1124. This affects the function base64_decode of the component fcgi_server. The manipulation of the argument Authorization leads to buffer overflow. It is possible to initiate the attack remotely."},{"lang":"de","value":"Dabei betrifft es die Funktion base64_decode der Komponente fcgi_server. Mittels dem Manipulieren des Arguments Authorization mit unbekannten Daten kann eine buffer overflow-Schwachstelle ausgenutzt werden. Die Umsetzung des Angriffs kann dabei über das Netzwerk erfolgen."}],"affected":[{"vendor":"INSTAR","product":"2K+","versions":[{"version":"3.11.1 Build 1124","status":"affected"}],"modules":["fcgi_server"]},{"vendor":"INSTAR","product":"4K","versions":[{"version":"3.11.1 Build 1124","status":"affected"}],"modules":["fcgi_server"]}],"references":[{"url":"https://vuldb.com/?id.319863","name":"VDB-319863 | INSTAR 2K+/4K fcgi_server base64_decode buffer overflow","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/?ctiid.319863","name":"VDB-319863 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://modzero.com/static/MZ-25-03_modzero_INSTAR.pdf","tags":["related"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":9.3,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X","baseSeverity":"CRITICAL"}},{"cvssV3_1":{"version":"3.1","baseScore":9.8,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:W/RC:R","baseSeverity":"CRITICAL"}},{"cvssV3_0":{"version":"3.0","baseScore":9.8,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:W/RC:R","baseSeverity":"CRITICAL"}},{"cvssV2_0":{"version":"2.0","baseScore":10,"vectorString":"AV:N/AC:L/Au:N/C:C/I:C/A:C/E:ND/RL:W/RC:UR"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-120","type":"CWE","lang":"en","description":"Buffer Overflow"}]},{"descriptions":[{"cweId":"CWE-119","type":"CWE","lang":"en","description":"Memory Corruption"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2025-08-13T06:14:02.783Z"},"timeline":[{"time":"2025-08-13T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2025-08-13T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2025-08-13T08:18:23.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"Michael Imfeld (modzero AG)","type":"finder"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-08-13T13:30:52.219157Z","id":"CVE-2025-8760","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-08-13T13:31:00.583Z"}}]}}}