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

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.7$0-$5k1.61

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 .

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

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

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

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: 216:43A:103

Submitinfo

Accepted

  • Submit #782053: Tenda 4G03 Pro V1.0 V04.03.01.53 Cryptographic Issues (by CoreNode)

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Might our Artificial Intelligence support you?

Check our Alexa App!