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Thousands of Juniper Networks devices vulnerable to critical RCE bug

ID: cfc12132-518b-5157-8fcd-eed67672aaeb

STIX ID: report--cfc12132-518b-5157-8fcd-eed67672aaeb

Feed Name: The Register (Security)

Threat Score
75/100

Date Published: 2024-01-15

Date Updated: 2026-04-26

Author: Connor Jones

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Juniper J‑Web has a critical unauthenticated out‑of‑bounds write vulnerability (CVE-2024-21591, CVSS 9.8) affecting many Junos OS versions and approximately 11,500 publicly exposed devices; vendors urge immediate patching or disabling J‑Web and restricting access while noting no confirmed exploitation in the wild.

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