What is CVE-2020-14080?

CVE-2020-14080 is a critical-severity vulnerability in Trendnet Tew-827dru, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-06-15.

How severe is CVE-2020-14080?

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

Buffer overflow in Trendnet Tew-827dru

CVE-2020-14080

TRENDnet TEW-827DRU devices through 2.06B04 contain a stack-based buffer overflow in the ssi binary. The overflow allows an unauthenticated user to execute arbitrary code by POSTing to apply_sec.cgi via the action ping_test with a sufficiently long ping_ipaddr key.

Vulnerability class: Buffer Overflow

Published 2020-06-15 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.023 (83.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/kuc001/IoTFirmware/blob/master/Trendnet/TEW-827/TRENDnet-ping_test.p… (Third Party Advisory)
github.com/kuc001/IoTFirmware/blob/master/Trendnet/TEW-827/ping_test_overflow.p… (Third Party Advisory)

Frequently asked questions

What is CVE-2020-14080?: CVE-2020-14080 is a critical-severity vulnerability in Trendnet Tew-827dru, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-06-15.
How severe is CVE-2020-14080?: Critical severity. CVSS v3 base score is 9.8 out of 10.