Adobe Connect EUVD-2026-22662

Exploitation requires victim user interaction-specifically clicking a malicious URL referencing the vulnerable Adobe Connect page. The vulnerability affects default Adobe Connect configurations without special feature enablement (AV:N/AC:L indicates standard attack surface). No authentication is required from the attacker's perspective (PR:N), though the victim must access Adobe Connect, implying they are likely authenticated users of the platform. The changed scope (S:C) suggests the vulnerability may require specific cross-origin conditions or particular Adobe Connect deployment configurations where the application can interact with other security contexts, though the exact technical requirements for scope change are not detailed in available data. Exploitation is LIMITED by the need for successful social engineering-victims must be convinced to follow attacker-controlled links, and modern browser XSS protections may block some obvious payloads, reducing success rates against security-aware users.

Multiple risk signals present a nuanced picture requiring careful analysis. The CVSS 9.3 score reflects maximum impact due to changed scope (S:C), network attack vector (AV:N), low complexity (AC:L), and high confidentiality/integrity impact (C:H/I:H). However, required user interaction (UI:R) means exploitation depends on successful social engineering-attackers must convince victims to click malicious links. SSVC framework classifies this as non-automatable with no current exploitation, aligning with EPSS's low 0.10% probability (27th percentile), indicating minimal observed attacker interest. No CISA KEV listing and no public POC further reduce immediate risk. The apparent contradiction between high CVSS and low real-world signals stems from the scope change metric, which inflates score but doesn't reflect exploitation difficulty. Priority should be moderate: patch during normal cycles for internet-facing instances, prioritize deployments handling sensitive data where scope change impact matters. This is NOT an immediate emergency despite the 9.3 score-contextual factors (UI required, no active exploitation, low attacker interest) substantially reduce urgency compared to CVSS-9.3 remote code execution vulnerabilities.

An attacker crafts a malicious URL containing JavaScript payload in a parameter processed by Adobe Connect's vulnerable page, then distributes it via phishing email or compromised website targeting Adobe Connect users. When a victim clicks the link while authenticated to Adobe Connect, the malicious script executes in their browser context with changed scope, potentially accessing session tokens, exfiltrating meeting data, or performing actions across other Adobe services if the victim maintains concurrent authenticated sessions. No public proof-of-concept exists at time of analysis, but reflected XSS exploitation techniques are well-documented and straightforward to implement.