How severe is CVE-2017-18020?

CVE-2017-18020 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-18020 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-18020?

CVE-2017-18020 primarily affects Samsung Samsung Mobile. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-18020?

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.

When was CVE-2017-18020 published?

CVE-2017-18020 was published on 2018-01-04 and last updated on 2026-06-17.

CVE-2017-18020

CVE-2017-18020 is a high-severity vulnerability in Samsung Samsung Mobile with a CVSS 3.x base score of 8.4. 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-20.

Key facts

Severity: High (CVSS 3.x base score 8.4)
CVSS v2: 7.2
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Samsung Samsung Mobile
Published: 2018-01-04
Last modified: 2026-06-17

Description

On Samsung mobile devices with L(5.x), M(6.x), and N(7.x) software and Exynos chipsets, attackers can execute arbitrary code in the bootloader because S Boot omits a size check during a copy of ramfs data to memory. The Samsung ID is SVE-2017-10598.

Frequently asked questions

What is CVE-2017-18020?: On Samsung mobile devices with L(5.x), M(6.x), and N(7.x) software and Exynos chipsets, attackers can execute arbitrary code in the bootloader because S Boot omits a size check during a copy of ramfs data to memory. The Samsung ID is SVE-2017-10598.
How severe is CVE-2017-18020?: CVE-2017-18020 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-18020 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-18020?: CVE-2017-18020 primarily affects Samsung Samsung Mobile. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-18020?: 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.
When was CVE-2017-18020 published?: CVE-2017-18020 was published on 2018-01-04 and last updated on 2026-06-17.

References

https://security.samsungmobile.com/securityUpdate.smsb

Affected products (9)

cpe:2.3:o:samsung:samsung_mobile:5.0:*:*:*:*:*:*:*
cpe:2.3:o:samsung:samsung_mobile:5.1:*:*:*:*:*:*:*
cpe:2.3:o:samsung:samsung_mobile:5.1.1:*:*:*:*:*:*:*
cpe:2.3:o:samsung:samsung_mobile:6.0:*:*:*:*:*:*:*
cpe:2.3:o:samsung:samsung_mobile:6.0.1:*:*:*:*:*:*:*
cpe:2.3:o:samsung:samsung_mobile:7.0:*:*:*:*:*:*:*
cpe:2.3:o:samsung:samsung_mobile:7.1:*:*:*:*:*:*:*
cpe:2.3:o:samsung:samsung_mobile:7.1.1:*:*:*:*:*:*:*
cpe:2.3:o:samsung:samsung_mobile:7.1.2:*:*:*:*:*:*:*

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