How severe is CVE-2020-9438?

CVE-2020-9438 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-9438 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9438?

CVE-2020-9438 affects Tinxy Smart Wifi Door Lock Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-9438?

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

When was CVE-2020-9438 published?

CVE-2020-9438 was published on 2020-06-23 and last updated on 2026-06-17.

CVE-2020-9438

CVE-2020-9438 is a medium-severity vulnerability in Tinxy Smart Wifi Door Lock Firmware with a CVSS 3.x base score of 5.9. 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-294.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-294
Affected product: Tinxy Smart Wifi Door Lock Firmware
Published: 2020-06-23
Last modified: 2026-06-17

Description

Tinxy Door Lock with firmware before 3.2 allow attackers to unlock a door by replaying an Unlock request that occurred when the attacker was previously authorized. In other words, door-access revocation is mishandled.

Frequently asked questions

What is CVE-2020-9438?: Tinxy Door Lock with firmware before 3.2 allow attackers to unlock a door by replaying an Unlock request that occurred when the attacker was previously authorized. In other words, door-access revocation is mishandled.
How severe is CVE-2020-9438?: CVE-2020-9438 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-9438 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9438?: CVE-2020-9438 affects Tinxy Smart Wifi Door Lock Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-9438?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-9438 published?: CVE-2020-9438 was published on 2020-06-23 and last updated on 2026-06-17.

References

https://medium.com/%40avishek_75733/smart-products-are-always-not-that-smart-tinxy-smart-door-lock-vulnerability-97f91e435e06

Affected products (1)

cpe:2.3:o:tinxy:smart_wifi_door_lock_firmware:*:*:*:*:*:*:*:*

Other CWE-294 (Authentication Bypass by Capture-replay) vulnerabilities

CVE-2025-49752 — Critical (CVSS 10.0): Azure Bastion Elevation of Privilege Vulnerability
CVE-2026-11856 — Critical (CVSS 9.8): Successfully using libcurl to do a transfer to a specific HTTP origin (`hostA`) with **Digest** authentication and then…
CVE-2026-32987 — Critical (CVSS 9.8): OpenClaw before 2026.3.13 allows bootstrap setup codes to be replayed during device pairing verification in…
CVE-2025-67135 — Critical (CVSS 9.8): Weak Security in the PF-50 1.2 keyfob of PGST PG107 Alarm System 1.25.05.hf allows attackers to compromise access…
CVE-2025-65552 — Critical (CVSS 9.8): D3D Wi-Fi Home Security System ZX-G12 v2.1.1 is vulnerable to RF replay attacks on the 433 MHz sensor communication…
CVE-2024-38438 — Critical (CVSS 9.8): D-Link - CWE-294: Authentication Bypass by Capture-replay

Browse all CWE-294 (Authentication Bypass by Capture-replay) vulnerabilities →