SunGrow WiNet-S V200.001.00.P025 and earlier versions is missing integrity checks for firmware upgrades.

published 2025-02-26 20 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-5292

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits: 0; none known

SunGrow WiNet-S V200.001.00.P025 and earlier versions is missing integrity checks for firmware upgrades. Sending a specific MQTT message allows an update to an inverter or a WiNet connectivity dongle with a bogus firmware file that is located on attacker-controlled server.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-072-12 updated 2025-03-13 cvss 8.1

Sungrow iSolarCloud Android App, WiNet Firmware

Sungrow iSolarCloud Android App <=2.1.6
affected: vendor fix, mitigation “For more information refer to Sungrow's security notice.” en.sungrowpower.com
Sungrow WiNet Firmware
affected: mitigation “For more information refer to Sungrow's security notice.” en.sungrowpower.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 20 mo ago (2025-02-28)

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Classification

Weakness

CWE-494 Download of Code Without Integrity Check

References

en.sungrowpower.com /security-notice-detail-2/6140
vendor-advisory

Sources

CVE List CVE-2024-50696
NVD CVE-2024-50696

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary