What is CVE-2021-25306?

CVE-2021-25306 is a high-severity vulnerability in Gigaset Dx600a, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2021-03-02.

How severe is CVE-2021-25306?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Gigaset Dx600a

CVE-2021-25306

A buffer overflow vulnerability in the AT command interface of Gigaset DX600A v41.00-175 devices allows remote attackers to force a device reboot by sending relatively long AT commands.

Vulnerability class: Buffer Overflow

Published 2021-03-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.015 (74.1th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: +0.001

Affected products

Gigaset Dx600a
Gigaset Dx600a Firmware — versions v41.00-175

Weakness classification (CWE)

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

References

research.nccgroup.com/2021/02/28/technical-advisory-administrative-passcode-rec… (Third Party Advisory)

Frequently asked questions

What is CVE-2021-25306?: CVE-2021-25306 is a high-severity vulnerability in Gigaset Dx600a, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2021-03-02.
How severe is CVE-2021-25306?: High severity. CVSS v3 base score is 7.5 out of 10.