What is CVE-2025-4826?

CVE-2025-4826 is a high-severity vulnerability in Totolink A3002r, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2025-05-17.

How severe is CVE-2025-4826?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2025-4826 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-2025-4826

A vulnerability, which was classified as critical, has been found in TOTOLINK A702R, A3002R and A3002RU 3.0.0-B20230809.1615. This issue affects some unknown processing of the file /boafrm/formWirelessTbl of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Vulnerability class: Buffer Overflow

Published 2025-05-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000

Affected products

Totolink A3002r — versions 3.0.0-B20230809.1615
Totolink A3002r Firmware — versions 3.0.0-b20230809.1615
Totolink A3002ru — versions 3.0.0-B20230809.1615
Totolink A3002ru Firmware — versions 3.0.0-b20230809.1615
Totolink A702r — versions 3.0.0-B20230809.1615
Totolink A702r Firmware — versions 3.0.0-b20230809.1615

Weakness classification (CWE)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
github.com/CH13hh/tmp_store_cc/blob/main/toto/5.md (exploit, Broken Link)
www.totolink.net/ (Product, product)

Frequently asked questions

What is CVE-2025-4826?: CVE-2025-4826 is a high-severity vulnerability in Totolink A3002r, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2025-05-17.
How severe is CVE-2025-4826?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2025-4826 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.