What’s Vulnerable › Vulnerabilities

CVE-2026-25599: Missing authentication and clear‑text data transmission affecting Orca heat pumps

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-01 · updated 2026-07-22
• Weakness: CWE-79

Description

Missing authentication and clear‑text transmission of data from the heat pumps to the control server, combined with the absence of input validation on aggregated data, can lead to stored XSS that enables theft of cookies from the pump’s web control interface. Older Orca heat pump devices communicating with the Orca server over an unencrypted and unauthenticated HTTP connection on a non-secure port specifically enable an attacker to impersonate a legitimate device and inject malicious payloads. This enables the insertion of harmful code directly into the Orca user portal, potentially compromising user accounts, exposing sensitive information, and allowing further unauthorized actions within the portal.

Affected products

• Orca Energy Orca heat pump: before 2.1.0 — fixed in 2.1.0
• Orca Energy Orca user portal: before 1.19 — fixed in 1.19

How to fix

Upgrade to a fixed version: Orca Energy Orca heat pump 2.1.0; Orca Energy Orca user portal 1.19. Check the vendor advisory for mitigations.

References

• https://www.cert.si/en/cve-2026-25599/

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