CVE-2026-5527 Tenda 4G03 Pro ECDSA P-256 Private Key server.key hard-coded key
Attackers can exploit a hard-coded ECDSA private key in Tenda 4G03 Pro routers to bypass security controls and access sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5527?
CVE-2026-5527 is a medium-severity vulnerability in Tenda 4G03 Pro, published on 4 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-5527?
It affects 1 product.
Products include Tenda 4g03 Pro Firmware.
How do I fix CVE-2026-5527?
No fix has been published for CVE-2026-5527 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-5527 being exploited?
There is no known exploitation of CVE-2026-5527 in the wild and no public exploit code.
Other vulnerabilities in Tenda 4G03 Pro
Sources
Also known as GHSA-pgjq-fxv2-9p7v.