Buffer overflow in Juniper Networks Junos OS
CVE-2026-101955
A Stack-based Buffer Overflow vulnerability in the UTM Anti-Spam SBL of Juniper Networks Junos OS on SRX series allows an unauthenticated remote attacker to cause arbitrary code execution or a denial of service via a injected malformed DNS packet when Anti-Spam SBL inspection is enabled.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- supportportal.juniper.net/JSA112186 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-101955?
- CVE-2026-101955 is a high-severity vulnerability in Juniper Networks Junos OS, classified under Stack-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-10-14.
- How severe is CVE-2026-101955?
- High severity. CVSS v3 base score is 8.1 out of 10.