CVE-2026-101980CWE-191

CVE-2026-101980

Critical · published October 14, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
39.7
In the wild
Unconfirmed
What it is

An Integer Underflow vulnerability in the kernel of Juniper Networks Junos OS with Extended Echo configured allows an unauthenticated, network-based attacker to cause a denial of service by a kernel crash.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L
EPSS
0.00470 · 39.7th percentile
Weakness
CWE-191 · Integer Underflow (Wrap or Wraparound)
Published
2026-10-14T21:17Z
References (1)
https://supportportal.juniper.net/JSA112188 · [email protected]
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 14 OCT 16:17Z
    Junos OS: Malformed Extended Echo requests cause a Routing Engine reboot when Extended Echo is enabled
    cvelistv5
  • 14 OCT 16:17Z
    Junos OS: Malformed Extended Echo requests cause a Routing Engine reboot when Extended Echo is enabled
    cvelistv5