CVE-2021-0266 Hardcoded credentials in Junos OS
Hard-coded cryptographic keys in Juniper cSRX allow attackers to take control of the device via management services.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-0266?
CVE-2021-0266 is a high-severity vulnerability in Juniper Junos, published on 22 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The use of multiple hard-coded cryptographic keys in cSRX Series software in Juniper Networks Junos OS allows an attacker to take control of any instance of a cSRX deployment through device management services. This issue affects: Juniper Networks Junos OS on cSRX Series: All versions prior to 20.2R3; 20.3 versions prior to 20.3R2; 20.4 versions prior to 20.4R2.
Which versions are affected by CVE-2021-0266?
It affects 1 product.
Products include Juniper Junos.
How do I fix CVE-2021-0266?
No fix has been published for CVE-2021-0266 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-0266 being exploited?
There is no known exploitation of CVE-2021-0266 in the wild and no public exploit code.
Other vulnerabilities in Juniper Junos
- CVE-2023-36845 Juniper Junos OS EX Series and SRX Series PHP External Variable Modification
- CVE-2020-1631 Juniper Junos OS Path Traversal
- CVE-2025-21590 Juniper Junos OS Improper Isolation or Compartmentalization
- CVE-2023-36851 Juniper Junos OS SRX Series Missing Authentication for Critical Function
- CVE-2023-36844 Juniper Junos OS EX Series PHP External Variable Modification
Sources
Also known as GHSA-9frr-8rxx-97f3.