How severe is CVE-2018-21090?

CVE-2018-21090 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-2018-21090 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-21090?

CVE-2018-21090 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-21090?

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-2018-21090 published?

CVE-2018-21090 was published on 2020-04-08 and last updated on 2026-06-17.

CVE-2018-21090

CVE-2018-21090 is a critical-severity vulnerability in Google Android 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Google Android
Published: 2020-04-08
Last modified: 2026-06-17

Description

An issue was discovered on Samsung mobile devices with software through 2017-11-03 (S.LSI modem chipsets). The Exynos modem chipset has a baseband buffer overflow. The Samsung ID is SVE-2017-10745 (January 2018).

Frequently asked questions

What is CVE-2018-21090?: An issue was discovered on Samsung mobile devices with software through 2017-11-03 (S.LSI modem chipsets). The Exynos modem chipset has a baseband buffer overflow. The Samsung ID is SVE-2017-10745 (January 2018).
How severe is CVE-2018-21090?: CVE-2018-21090 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-2018-21090 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-21090?: CVE-2018-21090 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-21090?: 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-2018-21090 published?: CVE-2018-21090 was published on 2020-04-08 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:o:google:android:-:*:*:*:*:*:*:*

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