CVE-2026-101979 Memory corruption in Junos OS
A network attacker with SNMP read access can trigger a stack buffer overflow in authd to execute root code or cause denial of service when SNMP and AAA are enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-101979?
CVE-2026-101979 is a high-severity memory corruption vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A Stack-based Buffer Overflow vulnerability in the authd Juniper Networks Junos OS and Junos OS Evolved allows a network attacker with SNMP read access to execute code with root privileges or cause a denial of service via a specific SNMP packet, when SNMP and AAA are enabled.
Weakness: CWE-121
Which versions are affected by CVE-2026-101979?
How do I fix CVE-2026-101979?
No fix has been published for CVE-2026-101979 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-101979 being exploited?
There is no known exploitation of CVE-2026-101979 in the wild and no public exploit code.
Sources
Also known as GHSA-cgph-8w37-fcq2.