CVE intelligence and bounded remediation
CVE-2026-27870 — An attacker with access via network to the Regesta Smart HD-PLC of the provider Teldat (in this case, registration action IS required)...
An attacker with access via network to the Regesta Smart HD-PLC of the provider Teldat (in this case, registration action IS required) who has the vulnerable software could, introduce arbitrary JavaScript by injecting a Cross-site Scripting (XSS) payload into the 'Hostname' field of the configuration file resulting in a XSS in the path /upgrade/query.php?cmd=p+3%3Bversion. This issue affects Regesta Smart HD-PLC - TLDPH16D2: 11.02.05.10.02.
- Severity
- Medium
- CVSS
- 4.8 (4.0)
- Published
- 2026-06-17
- CISA KEV
- Not currently listed
- Ecosystem
- javascript/npm
- Weaknesses
- CWE-79
Affected products
No browser-safe affected-product rows are available.
Matched remediation archetype
Cross-site scripting and unsafe browser output
This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.
Check exposure
- Trace reflected, stored, and DOM-derived untrusted values into HTML, attributes, URLs, styles, scripts, and client-side template sinks.
- Identify affected origins, authenticated user roles, sensitive browser capabilities, and where content is shared across tenants.
- Review framework escaping, rich-text sanitization, legacy templates, and client-side rendering paths.
Remediate safely
- Use context-aware framework output encoding and safe DOM APIs; keep untrusted data out of executable contexts.
- Sanitize intentionally supported markup with a maintained allowlist policy and validate URLs and attributes separately.
- Update affected rendering components and add tests for every output context using inert sentinel markup.
Authoritative sources
Complete CVE record and remediation plan
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