PT-2026-60715 · Tera Term · Ttssh2

CVE-2026-58317 · Published 2026-07-17 · Updated 2026-07-17

NVD

CVSS v3.1

6.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

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.

Fix

Weakness Enumeration

CWE-196

Related Identifiers

CVE-2026-58317

Affected Products

Ttssh2

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-58317 · Security Note
• https://jvn.jp/en/jp/JVN65294474 · Note
• https://teratermproject.github.io/SA/JVN65294474.html · Note
• https://teratermproject.github.io/SA/JVN65294474-en.html · Note