What is CVE-2025-25635?

CVE-2025-25635 is a high-severity vulnerability in Totolink A3002r, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.0/10. Published 2025-02-28.

How severe is CVE-2025-25635?

High severity. CVSS v3 base score is 8.0 out of 10.

Is CVE-2025-25635 known to be exploited?

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

Buffer overflow in Totolink A3002r

CVE-2025-25635

TOTOlink A3002R V1.1.1-B20200824.0128 contains a buffer overflow vulnerability. The vulnerability arises from the improper input validation of the pppoe_dns1 parameter in the formIpv6Setup interface of /bin/boa.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (33.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Totolink A3002r
Totolink A3002r_firmware — versions 1.1.1-b20200824.0128
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

SunnyYANGyaya/cuicuishark-sheep-fishIOT

References

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

Frequently asked questions

What is CVE-2025-25635?: CVE-2025-25635 is a high-severity vulnerability in Totolink A3002r, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.0/10. Published 2025-02-28.
How severe is CVE-2025-25635?: High severity. CVSS v3 base score is 8.0 out of 10.
Is CVE-2025-25635 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.