{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-27303/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":9.6,"id":"CVE-2026-27303"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Adobe Connect"],"_cs_severities":["critical"],"_cs_tags":["cve-2026-27303","deserialization","adobe-connect","code-execution"],"_cs_type":"advisory","_cs_vendors":["Adobe"],"content_html":"\u003cp\u003eAdobe Connect versions 2025.3, 12.10 and earlier are susceptible to a critical deserialization of untrusted data vulnerability identified as CVE-2026-27303. Successful exploitation could allow an attacker to execute arbitrary code within the security context of the current user. The vulnerability exists due to improper handling of serialized data, allowing malicious payloads to be injected. Exploitation of this vulnerability does not require user interaction making it particularly dangerous. Defenders should prioritize patching vulnerable Adobe Connect instances to prevent potential compromise.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker identifies an accessible Adobe Connect endpoint that processes serialized data.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious serialized object containing instructions for arbitrary code execution.\u003c/li\u003e\n\u003cli\u003eThe attacker sends the malicious serialized object to the vulnerable endpoint.\u003c/li\u003e\n\u003cli\u003eAdobe Connect deserializes the untrusted data without proper validation.\u003c/li\u003e\n\u003cli\u003eThe deserialization process triggers the execution of the embedded malicious code.\u003c/li\u003e\n\u003cli\u003eThe attacker gains arbitrary code execution within the context of the Adobe Connect application user.\u003c/li\u003e\n\u003cli\u003eThe attacker may leverage this initial access to escalate privileges on the system.\u003c/li\u003e\n\u003cli\u003eThe attacker can then install malware, exfiltrate sensitive data, or pivot to other systems on the network.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability allows for arbitrary code execution, leading to complete system compromise. This can result in data breaches, system downtime, and reputational damage. Given the critical nature of Adobe Connect in online meeting and collaboration environments, a successful attack could disrupt business operations and expose sensitive meeting content. Depending on the compromised user's privileges, the attacker may gain further access to other resources.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eImmediately patch Adobe Connect instances to the latest version to address CVE-2026-27303. Refer to the Adobe security advisory (\u003ca href=\"https://helpx.adobe.com/security/products/connect/apsb26-37.html\"\u003ehttps://helpx.adobe.com/security/products/connect/apsb26-37.html\u003c/a\u003e) for patching information.\u003c/li\u003e\n\u003cli\u003eInspect web server logs for unusual POST requests targeting Adobe Connect endpoints that handle serialized data. Deploy the Sigma rule provided below to identify suspicious activity.\u003c/li\u003e\n\u003cli\u003eMonitor process creation events for unexpected processes spawned by the Adobe Connect application (process_creation category) that may indicate successful exploitation.\u003c/li\u003e\n\u003cli\u003eReview network traffic for unusual outbound connections originating from the Adobe Connect server.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-26T12:00:00Z","date_published":"2024-01-26T12:00:00Z","id":"https://feed.craftedsignal.io/briefs/2024-01-26-adobe-connect-deserialization/","summary":"Adobe Connect versions 2025.3, 12.10 and earlier are vulnerable to deserialization of untrusted data, potentially leading to arbitrary code execution.","title":"Adobe Connect Deserialization Vulnerability (CVE-2026-27303)","url":"https://feed.craftedsignal.io/briefs/2024-01-26-adobe-connect-deserialization/"}],"language":"en","title":"CraftedSignal Threat Feed - Cve-2026-27303","version":"https://jsonfeed.org/version/1.1"}