CVE-2026-101976

8.7 HIGH 0.5% exploit odds Fix listed Memory safety Network gear

What it is

An Out-of-bounds Write vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an eBGP peer which has not negotiated four-octet-AS capability sending a specifically malformed BGP update to cause a Denial-of-Service (DoS).

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of service disruption.
Exploit odds: 0.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-09-28 16:31 UTC ReservedThe CVE id was reserved by its CNA
2026-10-14 18:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-15 16:23 UTC Last updatedMost recent change to the record

Details

Published: 2026-10-14 18:17 UTC
Last modified: 2026-10-15 16:23 UTC
Exploit probability: 0.5% · EPSS, next 30 days
Weakness: CWE-787 · Out-of-bounds write
Record status: Awaiting Analysis

Attack profile CVSS 4.0 · 8.7

Attack vector: Network
Complexity: Low
Attack requirements: None
Privileges needed: None
User interaction: None
Confidentiality: None
Integrity: None
Availability: High

Raw vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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References

https://supportportal.juniper.net/JSA112187

NVD record · CVE.org record