What is CVE-2025-29329?

CVE-2025-29329 is a critical-severity vulnerability in Sagemcom F\@st_3686, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2026-01-12.

How severe is CVE-2025-29329?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Sagemcom F\@st_3686

CVE-2025-29329

Buffer Overflow in the ippprint (Internet Printing Protocol) service in Sagemcom F@st 3686 MAGYAR_4.121.0 allows remote attacker to execute arbitrary code by sending a crafted HTTP request.

Vulnerability class: Buffer Overflow

EPSS: 0.012 (63.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Sagemcom F\@st_3686
Sagemcom F\@st_3686_firmware — versions 4.121.0
N/a — versions n/a

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

cve@mitre.org (Product)
cve@mitre.org (Not Applicable)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-29329?: CVE-2025-29329 is a critical-severity vulnerability in Sagemcom F\@st_3686, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2026-01-12.
How severe is CVE-2025-29329?: Critical severity. CVSS v3 base score is 9.8 out of 10.