How severe is CVE-2026-36176?

CVE-2026-36176 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over physical access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-36176 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-36176?

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

Does CVE-2026-36176 have an EU (EUVD) identifier?

Yes. CVE-2026-36176 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34279.

When was CVE-2026-36176 published?

CVE-2026-36176 was published on 2026-06-04 and last updated on 2026-07-05.

CVE-2026-36176

CVE-2026-36176 is a high-severity vulnerability with a CVSS 3.x base score of 7.1. 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-312.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34279
Weakness: CWE-312
Published: 2026-06-04
Last modified: 2026-07-05

Description

GNCC GP5 v7.1.76 was discovered to store pre-signed Backblaze B2 upload URLs (PUT requests) in plaintext to the serial console. This allows physically-proximate attackers to extract these active tokens to perform unauthorized operations via monitoring the serial UART interface.

Frequently asked questions

What is CVE-2026-36176?: GNCC GP5 v7.1.76 was discovered to store pre-signed Backblaze B2 upload URLs (PUT requests) in plaintext to the serial console. This allows physically-proximate attackers to extract these active tokens to perform unauthorized operations via monitoring the serial UART interface.
How severe is CVE-2026-36176?: CVE-2026-36176 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over physical access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-36176 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-36176?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-36176 have an EU (EUVD) identifier?: Yes. CVE-2026-36176 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34279.
When was CVE-2026-36176 published?: CVE-2026-36176 was published on 2026-06-04 and last updated on 2026-07-05.

References

https://github.com/BadChemical/IoT-Vulnerability-Research-Public/blob/main/GNCC-GP5-T23/README.md

EU advisories (EUVD)

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