CVE-2026-58317CWE-196

Unsigned to Signed Conversion Error (CWE-196) vulnerability exists in TTSSH2 plugin of Tera Term provided by TeraTerm Project

Medium · published July 17, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
24.6
In the wild
Unconfirmed
What it is

Unsigned to Signed Conversion Error (CWE-196) vulnerability exists in TTSSH2 plugin of Tera Term provided by TeraTerm Project. When Tera Term attempts to establish an SSH connection to a server set up by an attacker, out-of-bounds read/write may occur. As a result, the contents of adjacent memory regions may be transmitted to the server, and Tera Term may behave unexpected or terminate abnormally.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
EPSS
0.00320 · 24.6th percentile
Weakness
CWE-196 · Unsigned to Signed Conversion Error
Published
2026-07-17T04:14Z
EPSS history
Timeline
  • 17 JUL 04:14Z
    Unsigned to Signed Conversion Error (CWE-196) vulnerability exists in TTSSH2 plugin of Tera Term provided by TeraTerm Project
    cvelistv5