CVE-2026-22321CWE-121

Stack-Based Buffer Overflow in CLI Login Username Handling over CLI

Medium · published March 18, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
30.8
In the wild
Unconfirmed
What it is

A stack-based buffer overflow in the device's Telnet/SSH CLI login routine occurs when a unauthenticated attacker send an oversized or unexpected username input. An overflow condition crashes the thread handling the login attempt, forcing the session to close. Because other CLI sessions remain unaffected, the impact is limited to a low‑severity availability disruption.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00381 · 30.8th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-03-18T07:34Z
EPSS history
Timeline
  • 18 MAR 07:34Z
    Stack-Based Buffer Overflow in CLI Login Username Handling over CLI
    cvelistv5