What is CVE-2025-28019?

CVE-2025-28019 is a high-severity vulnerability in Totolink A800r, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.3/10. Published 2025-04-23.

How severe is CVE-2025-28019?

High severity. CVSS v3 base score is 7.3 out of 10.

Is CVE-2025-28019 known to be exploited?

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

Buffer overflow in Totolink A800r

CVE-2025-28019

TOTOLINK A800R V4.1.2cu.5137_B20200730 was found to contain a buffer overflow vulnerability in the downloadFile.cgi component

Vulnerability class: Buffer Overflow

EPSS: 0.004 (32.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Totolink A800r
Totolink A800r_firmware — versions 4.1.2cu.5137_b20200730
N/a — versions n/a

Weakness classification (CWE)

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

Public proof-of-concept exploits

Lunax0/CVE_

References

cve@mitre.org (Exploit, Third Party Advisory)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-28019?: CVE-2025-28019 is a high-severity vulnerability in Totolink A800r, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.3/10. Published 2025-04-23.
How severe is CVE-2025-28019?: High severity. CVSS v3 base score is 7.3 out of 10.
Is CVE-2025-28019 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.