Buffer overflow in Totolink A3000ru
CVE-2025-28028
TOTOLINK A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5185_B20201128, and A3100R V4.1.2cu.5247_B20211129 were found to contain a buffer overflow vulnerability in downloadFile.cgi through the v5 parameter.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (30.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Totolink A3000ru
- Totolink A3000ru Firmware — versions 5.9c.5185_b20201128
- Totolink A3100r
- Totolink A3100r Firmware — versions 4.1.2cu.5247_b20211129
- Totolink A830r
- Totolink A830r Firmware — versions 4.1.2cu.5182_b20201102
- Totolink A950rg
- Totolink A950rg Firmware — versions 4.1.2cu.5161_b20200903
Weakness classification (CWE)
Public proof-of-concept exploits
References
- locrian-lightning-dc7.notion.site/BufferOverflow4-1948e5e2b1a280b9809af4db6f9e6… (Exploit, Third Party Advisory)
- locrian-lightning-dc7.notion.site/CVE-2025-28028-BufferOverflow4-1948e5e2b1a280… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-28028?
- CVE-2025-28028 is a high-severity vulnerability in Totolink A3000ru, 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-2025-28028?
- High severity. CVSS v3 base score is 7.3 out of 10.
- Is CVE-2025-28028 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.