vulnerability
Juniper Junos OS: 2026-01 Security Bulletin: Junos OS: SRX Series: If a specific request is processed by the DNS subsystem flowd will crash (JSA106020) (CVE-2026-21920)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | Jan 14, 2026 | Jan 27, 2026 | Jan 27, 2026 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Jan 14, 2026
Added
Jan 27, 2026
Modified
Jan 27, 2026
Description
An Unchecked Return Value vulnerability in the DNS module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
Solution
juniper-junos-os-upgrade-latest
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