How severe is CVE-2017-7563?

CVE-2017-7563 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-7563 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-7563?

CVE-2017-7563 affects Trustedfirmware Trusted Firmware-a. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-7563?

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-2017-7563 published?

CVE-2017-7563 was published on 2017-06-07 and last updated on 2026-06-17.

CVE-2017-7563

CVE-2017-7563 is a high-severity vulnerability in Trustedfirmware Trusted Firmware-a with a CVSS 3.x base score of 8.1. 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-732.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Trustedfirmware Trusted Firmware-a
Published: 2017-06-07
Last modified: 2026-06-17

Description

In ARM Trusted Firmware 1.3, RO memory is always executable at AArch64 Secure EL1, allowing attackers to bypass the MT_EXECUTE_NEVER protection mechanism. This issue occurs because of inconsistency in the number of execute-never bits (one bit versus two bits).

Frequently asked questions

What is CVE-2017-7563?: In ARM Trusted Firmware 1.3, RO memory is always executable at AArch64 Secure EL1, allowing attackers to bypass the MT_EXECUTE_NEVER protection mechanism. This issue occurs because of inconsistency in the number of execute-never bits (one bit versus two bits).
How severe is CVE-2017-7563?: CVE-2017-7563 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-7563 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-7563?: CVE-2017-7563 affects Trustedfirmware Trusted Firmware-a. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-7563?: 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-2017-7563 published?: CVE-2017-7563 was published on 2017-06-07 and last updated on 2026-06-17.

References

https://github.com/ARM-software/arm-trusted-firmware/wiki/ARM-Trusted-Firmware-Security-Advisory-TFV-3

Affected products (1)

cpe:2.3:o:trustedfirmware:trusted_firmware-a:*:*:*:*:*:*:*:*

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