CVE-2026-5527: A weakness has been identified in Tenda 4G03 Pro 1.0/1.0re/01.bin/04.03.01.53

Routine

MEDIUM 5.3REMOTEMITIGATE

CVE-2026-5527 is a medium-severity flaw (CVSS 5.3) affecting 4g03 pro firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-320, CWE-321
Published	2026-04-05
Last modified	2026-07-24

Publisher (CNA): VulDB · Vendor: tenda

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-05 00:16 UTCPublished CVE record published
2026-07-24 09:10 UTCUpdated Record last modified

tenda 4g03 pro firmware MITIGATE

Affected: 04.03.01.53

Fixed in: no fixed release known

Safe to downgrade to: a release before 04.03.01.53

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-5527?

4g03 pro firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-5527 being exploited?

CVE-2026-5527 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-5527 affect?

CVE-2026-5527 affects 4g03 pro firmware. Severity is medium (CVSS 5.3). 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 caus

How urgent is CVE-2026-5527?

Priority 33/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-5526 HIGH 7.3 MITIGATE A security flaw has been discovered in Tenda 4G03 Pro up to 1.0/1.1/04.03.01.53/192.168.0.1

References

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