CVE-2026-25599Network attack vector

Session theft via unauthenticated device data injection

Published Jun 1, 2026 · Updated Jun 1, 2026

Stored XSS in the Orca Energija portal before 1.19 allows remote attackers to steal session cookies via forged heat-pump data. Legacy Orca Heat Pump firmware before 2.1.0 sends only a device ID over cleartext HTTP; the backend accepts it without verification and renders forwarded fields without validation or output encoding. Remote attackers must reuse or guess a valid device ID, and code executes when an authenticated portal user views the persistent data, enabling account access and heat-pump control.

CVSS severity6.3
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored XSS in the Orca Energija portal before 1.19 allows remote attackers to steal session cookies via forged heat-pump data. Legacy Orca Heat Pump firmware before 2.1.0 sends only a device ID over cleartext HTTP; the backend accepts it without verification and renders forwarded fields without validation or output encoding. Remote attackers must reuse or guess a valid device ID, and code executes when an authenticated portal user views the persistent data, enabling account access and heat-pump control.

The record

CVE
CVE-2026-25599
Published
Jun 1, 2026
Updated
Jun 1, 2026
Vendor
Orca Energija
Product
Orca Heat Pump
Classifications
CWE-319, CWE-306, CWE-79, T1190, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Orca Energija · Orca Heat Pumpversion=0 <2.1.0
Orca Energija · My Orcaversion=0 <1.19

Published CVSS scores

6.3SI-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
CWE-306Missing Authentication for Critical Function
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1190Exploit Public-Facing Application
T1539Steal Web Session Cookie

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo