CVE-2026-101955

HIGHCVSS 8.1/10EPSS 0.57%

Last modified

CVE-2026-101955 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

Description

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.

Metrics

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
Juniper NetworksJunos OS< 23.2R2-S7.7; >= 23.4, < 23.4R2-S8.13; >= 24.2, < 24.2R2-S5.5; >= 24.4, < 24.4R2-S5; >= 25.2, < 25.2R2-S2; >= 25.4, < 25.4R1-S3; >= 26.2, < 26.2R1-S2

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is 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.
How severe is CVE-2026-101955?
CVE-2026-101955 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.
How do I fix CVE-2026-101955?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

Are you affected by CVE-2026-101955?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST