How severe is CVE-2026-30603?

CVE-2026-30603 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-30603 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-30603?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-30603 have an EU (EUVD) identifier?

Yes. CVE-2026-30603 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18370.

When was CVE-2026-30603 published?

CVE-2026-30603 was published on 2026-04-02 and last updated on 2026-07-05.

CVE-2026-30603

CVE-2026-30603 is a medium-severity vulnerability with a CVSS 3.x base score of 6.8. 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-345.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18370
Weakness: CWE-345
Published: 2026-04-02
Last modified: 2026-07-05

Description

An issue in the firmware update mechanism of Qianniao QN-L23PA0904 v20250721.1640 allows attackers to gain root access, install backdoors, and exfiltrate data via supplying a crafted iu.sh script contained in an SD card.

Frequently asked questions

What is CVE-2026-30603?: An issue in the firmware update mechanism of Qianniao QN-L23PA0904 v20250721.1640 allows attackers to gain root access, install backdoors, and exfiltrate data via supplying a crafted iu.sh script contained in an SD card.
How severe is CVE-2026-30603?: CVE-2026-30603 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-30603 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-30603?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-30603 have an EU (EUVD) identifier?: Yes. CVE-2026-30603 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18370.
When was CVE-2026-30603 published?: CVE-2026-30603 was published on 2026-04-02 and last updated on 2026-07-05.

References

https://github.com/0xghostrush/Research/blob/main/CVE-2026-30603/CVE-2026-30603.md

EU advisories (EUVD)

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