A weakness was found in Encrypt Only boot mode in Zynq UltraScale+ devices.

published 2019-09-03 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-15058

cvss: 5.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 16%
public exploits: 0; none known

A weakness was found in Encrypt Only boot mode in Zynq UltraScale+ devices. This could lead to an adversary being able to modify the control fields of the boot image leading to an incorrect secure boot behavior.

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:N/I:P/A:N

Affected products

n/a Zynq UltraScale+ SoC

Classification

Weakness

CWE-657 Violation of Secure Design Principles
CWE-345 Insufficient Verification of Data Authenticity

References

xilinx.com /support/answers/72588.html
vendor-advisory
github.com /inversepath/advisories/blob/master/Security_Advisory-Ref_FSC-HWSEC-VR2019-0001-Xilinx_ZU+-Encrypt_Only_Secure
third-party-advisory

Sources

CVE List CVE-2019-5478
NVD CVE-2019-5478

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary