Dashboard / CVE-2026-121969

CVE-2026-121969

HIGH
MEDIUM Priority: 0.02 BB Relevance: 64/100
Published: 2026-11-04 Modified: 2026-11-12 First seen: 2026-11-04 Status: active

Attack Surface

Network Low Complexity No Auth

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Passive
S: X
AT: None
VC: None
VI: None
VA: High

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.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
quozl netrek-client-cow 0
quozl netrek-client-cow 0

References & Advisories (5)

Bug Bounty Relevance

64 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

7.1 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.34%
Raw Score 0.003440
Percentile 28.4%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00344
2026-11-12
0.00344
2026-11-10
0.00344
2026-11-09
0.00344
2026-11-08
0.00344
2026-11-07
0.00344
2026-11-06
0.00344
2026-11-05
0.00344

Intelligence Sources

mitre ref →
nvd ref →

External Links