CVE-2026-5527 | Tenda 4G03 Pro 1.0/1.0re/01.bin/04.03.01.53 ECDSA P-256 Private Key /etc/www/pem/server.key hard-coded key

VDB-355280 · CVE-2026-5527 · GCVE-100-355280 TENDA 4G03 PRO 1.0/1.0RE/01.BIN/04.03.01.53 ECDSA P-256 PRIVATE KEY /ETC/WWW/PEM/SERVER.KEY HARD-CODED KEY HISTORYDIFFRELATEJSONXMLCTI Summaryinfo A vulnerability, which was classified as problematic, was found in Tenda 4G03 Pro 1.0/1.0re/01.bin/04.03.01.53. This affects an unknown part of the file /etc/www/pem/server.key of the component ECDSA P-256 Private Key Handler. Such manipulation leads to hard-coded key. This vulnerability is referenced as CVE-2026-5527. It is possible to launch the attack remotely. Furthermore, an exploit is available. Restrictive firewalling should be applied. Detailsinfo A vulnerability was found in Tenda 4G03 Pro 1.0/1.0re/01.bin/04.03.01.53 and classified as problematic. 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. The manipulation with an unknown input leads to a hard-coded key vulnerability. Using CWE to declare the problem leads to CWE-321. The use of a hard-coded cryptographic key significantly increases the possibility that encrypted data may be recovered. Impacted is confidentiality. This vulnerability is handled as CVE-2026-5527. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a exploit are known. The MITRE ATT&CK project declares the attack technique as T1600.001. It is declared as proof-of-concept. Addressing this vulnerability is possible by firewalling . Productinfo Type Router Operating System Vendor Tenda Name 4G03 Pro Version 1.0 1.0re 01.bin 04.03.01.53 License commercial Website Vendor: https://www.tenda.com.cn/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.3 VulDB Meta Temp Score: 4.7 VulDB Base Score: 5.3 VulDB Temp Score: 4.7 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Hard-coded key CWE: CWE-321 / CWE-320 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Proof-of-Concept Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Firewall Status: 🔍 0-Day Time: 🔒 Timelineinfo 04/04/2026 Advisory disclosed 04/04/2026 +0 days VulDB entry created 04/04/2026 +0 days VulDB entry last update Sourcesinfo Vendor: tenda.com.cn Status: Not defined CVE: CVE-2026-5527 (🔒) GCVE (CVE): GCVE-0-2026-5527 GCVE (VulDB): GCVE-100-355280 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 04/04/2026 08:25 Changes: 04/04/2026 08:25 (54) Complete: 🔍 Submitter: CoreNode Cache ID: 99:75B:101 Submitinfo Accepted Submit #782053: Tenda 4G03 Pro V1.0 V04.03.01.53 Cryptographic Issues (by CoreNode) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸