How severe is CVE-2018-12336?

CVE-2018-12336 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-12336 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-12336?

CVE-2018-12336 affects Ecos Secure Boot Stick Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-12336?

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-2018-12336 published?

CVE-2018-12336 was published on 2018-06-17 and last updated on 2026-06-17.

CVE-2018-12336

CVE-2018-12336 is a critical-severity vulnerability in Ecos Secure Boot Stick Firmware with a CVSS 3.x base score of 9.8. 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-200.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Ecos Secure Boot Stick Firmware
Published: 2018-06-17
Last modified: 2026-06-17

Description

Undocumented Factory Backdoor in ECOS Secure Boot Stick (aka SBS) 5.6.5 allows the vendor to extract confidential information via remote root SSH access.

Frequently asked questions

What is CVE-2018-12336?: Undocumented Factory Backdoor in ECOS Secure Boot Stick (aka SBS) 5.6.5 allows the vendor to extract confidential information via remote root SSH access.
How severe is CVE-2018-12336?: CVE-2018-12336 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-12336 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-12336?: CVE-2018-12336 affects Ecos Secure Boot Stick Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-12336?: 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-2018-12336 published?: CVE-2018-12336 was published on 2018-06-17 and last updated on 2026-06-17.

References

https://telematik.prakinf.tu-ilmenau.de/ecos-sbs/advisory.html

Affected products (1)

cpe:2.3:o:ecos:secure_boot_stick_firmware:5.6.5:*:*:*:*:*:*:*

More vulnerabilities in Ecos Secure Boot Stick Firmware

CVE-2018-12333 — High (CVSS 8.1): Insufficient Verification of Data Authenticity vulnerability in ECOS Secure Boot Stick (aka SBS) 5.6.5 allows an…
CVE-2018-12330 — High (CVSS 8.1): Protection Mechanism Failure in ECOS Secure Boot Stick (aka SBS) 5.6.5 allows an attacker to compromise authentication…
CVE-2018-12334 — High (CVSS 7.5): Protection Mechanism Failure in ECOS Secure Boot Stick (aka SBS) 5.6.5 allows an attacker to compromise authentication…
CVE-2018-12329 — Medium (CVSS 5.9): Protection Mechanism Failure in ECOS Secure Boot Stick (aka SBS) 5.6.5 allows a local attacker to duplicate an…
CVE-2018-12337 — Medium (CVSS 4.6): Reliance on Security Through Obscurity vulnerability in ECOS Secure Boot Stick (aka SBS) 5.6.5 allows an attacker to…
CVE-2018-12332 — Medium (CVSS 4.2): Incomplete Cleanup vulnerability in ECOS Secure Boot Stick (aka SBS) 5.6.5 allows an attacker to compromise…

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