How severe is CVE-2026-15203?

CVE-2026-15203 has a CVSS 4.0 base score of 9.3, rated critical severity.

Is CVE-2026-15203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-15203?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-15203 published?

CVE-2026-15203 was published on 2026-08-26 and last updated on 2026-09-03.

CVE-2026-15203

CVE-2026-15203 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1191.

Key facts

Severity: Critical (CVSS 4.0 base score 9.3)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1191
Published: 2026-08-26
Last modified: 2026-09-03

Description

Improper access control in debug and engineering interfaces in Danfoss iC7-Automation SP, iC7-Marine, and iC7-Hybrid GR3 allows attackers to gain read/write access to internal values, upload and execute unsigned applications, and upload unsigned EEPROM data and firmware via exposed service interfaces and software update mechanisms

Frequently asked questions

What is CVE-2026-15203?: Improper access control in debug and engineering interfaces in Danfoss iC7-Automation SP, iC7-Marine, and iC7-Hybrid GR3 allows attackers to gain read/write access to internal values, upload and execute unsigned applications, and upload unsigned EEPROM data and firmware via exposed service interfaces and software update mechanisms
How severe is CVE-2026-15203?: CVE-2026-15203 has a CVSS 4.0 base score of 9.3, rated critical severity.
Is CVE-2026-15203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-15203?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-15203 published?: CVE-2026-15203 was published on 2026-08-26 and last updated on 2026-09-03.

References

Other CWE-1191 vulnerabilities

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CVE-2025-52533 — High (CVSS 8.7): Improper Access Control in an on-chip debug interface could allow a privileged attacker to enable a debug interface and…
CVE-2025-9709 — High (CVSS 8.6): On-Chip Debug and Test Interface With Improper Access Control and Improper Protection against Electromagnetic Fault…
CVE-2024-41692 — High (CVSS 8.6): This vulnerability exists in SyroTech SY-GPON-1110-WDONT Router due to presence of root terminal access on a serial…
CVE-2025-65821 — High (CVSS 7.5): As UART download mode is still enabled on the ESP32 chip on which the firmware runs, an adversary can dump the flash…
CVE-2026-34494 — High (CVSS 7.2): - On-Chip Debug Interface vulnerability in Johnson Controls Neo Series MVP2 allows Collect Data from Common Resource…

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