How severe is CVE-2020-3681?

CVE-2020-3681 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-2020-3681 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3681?

CVE-2020-3681 affects Qualcomm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-3681?

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-2020-3681 published?

CVE-2020-3681 was published on 2020-07-31 and last updated on 2026-06-17.

CVE-2020-3681

CVE-2020-3681 is a critical-severity vulnerability in Qualcomm 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-327.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-327
Affected product: Qualcomm
Published: 2020-07-31
Last modified: 2026-06-17

Description

Authenticated and encrypted payload MMEs can be forged and remotely sent to any HPAV2 system using a jailbreak key recoverable from code.

Frequently asked questions

What is CVE-2020-3681?: Authenticated and encrypted payload MMEs can be forged and remotely sent to any HPAV2 system using a jailbreak key recoverable from code.
How severe is CVE-2020-3681?: CVE-2020-3681 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-2020-3681 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3681?: CVE-2020-3681 affects Qualcomm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-3681?: 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-2020-3681 published?: CVE-2020-3681 was published on 2020-07-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:h:qualcomm:-:-:*:*:*:*:*:*:*

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