CVE-2026-121969
Medium
Description
netrek-client-cow through 3.3.3 contains a stack-based buffer overflow vulnerability in handleSMessage() in short.c that allows malicious servers to overflow a 100-byte stack buffer by sending oversized SP_S_MESSAGE packets. A malicious Netrek server or man-in-the-middle on the plaintext TCP connection can send overlong or unterminated message bodies to write server-controlled bytes onto the stack and crash the client.
SeverityMedium
CVSS6.5
Exploit probability—
ProductQuozl Netrek-client-cow
PublishedNov 4, 2026
First seenNov 4, 2026
Weakness typeCWE-121CWE-121
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| quozl netrek-client-cow | v ≤ 3.3.3 | — |
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