Buffer overflow in Totolink A3000ru
CVE-2025-4496
A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
Vulnerability class: Buffer Overflow
Published · last modified .
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: 0.012 (68.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: +0.001
Affected products
- Totolink A3000ru — versions 4.1.8cu.5241_B20210927
- Totolink A3000ru Firmware — versions 4.1.8cu.5241_b20210927
- Totolink A3100r — versions 4.1.8cu.5241_B20210927
- Totolink A3100r Firmware — versions 4.1.8cu.5241_b20210927
- Totolink A800r — versions 4.1.8cu.5241_B20210927
- Totolink A800r Firmware — versions 4.1.8cu.5241_b20210927
- Totolink A810r — versions 4.1.8cu.5241_B20210927
- Totolink A810r Firmware — versions 4.1.8cu.5241_b20210927
- Totolink A950rg — versions 4.1.8cu.5241_B20210927
- Totolink A950rg Firmware — versions 4.1.8cu.5241_b20210927
Weakness classification (CWE)
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/tt/ta/1.md (exploit, Broken Link)
- www.totolink.net/ (Product, product)
Frequently asked questions
- What is CVE-2025-4496?
- CVE-2025-4496 is a high-severity vulnerability in Totolink A3000ru, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2025-05-10.
- How severe is CVE-2025-4496?
- High severity. CVSS v3 base score is 8.8 out of 10.