Vulnerability in Tenda 4g03 Pro
CVE-2026-5527
A weakness has been identified in Tenda 4G03 Pro 1.0/1.0re/01.bin/04.03.01.53. Affected by this issue is some unknown functionality of the file /etc/www/pem/server.key of the component ECDSA P-256 Private Key Handler. This manipulation causes use of hard-coded cryptographic key . It is possible to initiate the attack remotely.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (45.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.0% 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: 0.006 · change: +0.001
Affected products
- Tenda 4g03 Pro — versions 1.0, 1.0re, 01.bin
- Tenda 4g03 Pro — versions 1.0
- Tenda 4g03 Pro Firmware — versions 04.03.01.53
Weakness classification (CWE)
References
- vuldb.com/vuln/355280 (VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/355280/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/782053 (VDB Entry, Third Party Advisory, third-party-advisory)
- www.tenda.com.cn/ (Product, product)
Frequently asked questions
- What is CVE-2026-5527?
- CVE-2026-5527 is a medium-severity vulnerability in Tenda 4g03 Pro, classified under CWE-320. CVSS score: 5.3/10. Published 2026-04-05.
- How severe is CVE-2026-5527?
- Medium severity. CVSS v3 base score is 5.3 out of 10.