What is CVE-2025-57071?

CVE-2025-57071 is a high-severity vulnerability in Tenda G3, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2025-09-09.

How severe is CVE-2025-57071?

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

Is CVE-2025-57071 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Tenda G3

CVE-2025-57071

Tenda G3 v3.0br_V15.11.0.17 was discovered to contain a stack overflow in the vpnUsers parameter in the formAddVpnUsers function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

Vulnerability class: Buffer Overflow

Published 2025-09-09 · 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: 0.005 (39.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

github.com/vulnDetailRecord/VulforDevice/blob/main/Tenda/G3/formAddVpnUsers.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-57071?: CVE-2025-57071 is a high-severity vulnerability in Tenda G3, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2025-09-09.
How severe is CVE-2025-57071?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2025-57071 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.