Buffer overflow in Totolink A702r
CVE-2025-9783
A vulnerability was determined in TOTOLINK A702R 4.0.0-B20211108.1423. This issue affects the function sub_418030 of the file /boafrm/formParentControl. Executing manipulation of the argument submit-url can lead to buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.
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: 0.007 (49.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.000
Affected products
- Totolink A702r — versions 4.0.0-B20211108.1423
- Totolink A702r Firmware — versions 4.0.0-b20211108.1423
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/rew1X/CVE/blob/main/TOTOLINK/A702R/formParentControl/formParentContr… (related, Broken Link)
- github.com/rew1X/CVE/blob/main/TOTOLINK/A702R/formParentControl/formParentContr… (exploit, Broken Link)
- www.totolink.net/ (Product, product)
Frequently asked questions
- What is CVE-2025-9783?
- CVE-2025-9783 is a high-severity vulnerability in Totolink A702r, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2025-09-01.
- How severe is CVE-2025-9783?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2025-9783 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.