How severe is CVE-2026-5527?

CVE-2026-5527 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-5527 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5527?

CVE-2026-5527 affects Tenda 4g03 Pro Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5527?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-5527 have an EU (EUVD) identifier?

Yes. CVE-2026-5527 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19003.

When was CVE-2026-5527 published?

CVE-2026-5527 was published on 2026-04-05 and last updated on 2026-06-17.

CVE-2026-5527

CVE-2026-5527 is a medium-severity vulnerability in Tenda 4g03 Pro Firmware with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-320.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
CVSS v4: 5.5
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19003
Weakness: CWE-320
Affected product: Tenda 4g03 Pro Firmware
Published: 2026-04-05
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-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 . It is possible to initiate the attack remotely.
How severe is CVE-2026-5527?: CVE-2026-5527 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-5527 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5527?: CVE-2026-5527 affects Tenda 4g03 Pro Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5527?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5527 have an EU (EUVD) identifier?: Yes. CVE-2026-5527 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19003.
When was CVE-2026-5527 published?: CVE-2026-5527 was published on 2026-04-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:4g03_pro_firmware:04.03.01.53:*:*:*:*:*:*:*

More vulnerabilities in Tenda 4g03 Pro Firmware

CVE-2026-5526 — High (CVSS 7.3): A security flaw has been discovered in Tenda 4G03 Pro up to 1.0/1.1/04.03.01.53/192.168.0.1. Affected by this…

All CVEs affecting Tenda 4g03 Pro Firmware →

Other CWE-320 vulnerabilities

CVE-2016-10467 — Critical (CVSS 9.8): In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Automobile and Snapdragon Mobile SD…
CVE-2016-10421 — Critical (CVSS 9.8): In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Mobile and Snapdragon Wear MDM9206,…
CVE-2018-0124 — Critical (CVSS 9.8): A vulnerability in Cisco Unified Communications Domain Manager could allow an unauthenticated, remote attacker to…
CVE-2015-0936 — Critical (CVSS 9.8): Ceragon FibeAir IP-10 have a default SSH public key in the authorized_keys file for the mateidu user, which allows…
CVE-2015-4166 — Critical (CVSS 9.8): Cloudera Key Trustee Server before 5.4.3 does not store keys synchronously, which might allow attackers to have…
CVE-2024-36391 — Critical (CVSS 9.1): MileSight DeviceHub - CWE-320: Key Management Errors may allow Authentication Bypass and Man-In-The-Middle Traffic

Browse all CWE-320 vulnerabilities →