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Vulnerabilities

Vulnerability · CVE-2026-5527

A weakness has been identified in Tenda 4G03 Pro 1.0/1.0re/01.bin/04.03.01.53.

Published Apr 5, 2026 · catalog updated Jul 24, 2026 · 4g03 pro firmware

Check if you run it

No confirmed exploitation is on record for CVE-2026-5527. EPSS is 0.57%. Act only if a listed version of 4g03 pro firmware is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.57%
Remediation
Advisory link
Affected products
cpe tenda/4g03 pro firmware

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe tenda/4g03 pro firmware04.03.01.53

How to fix CVE-2026-5527

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-5527. EPSS is 0.57%. Act only if a listed version of 4g03 pro firmware is installed.

Which versions are affected?

Compare what you have installed with tenda/4g03 pro firmware 04.03.01.53. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-320; CWE-321. EPSS 0.57%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 5, 2026 · NIST NVD

    Detected

    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.

  2. Jul 24, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-5527

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-5527

    30-day exploitation probability 0.6%

    first.org
  • NIST NVDVulnerability recordCVE-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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.