How severe is CVE-2020-11539?

CVE-2020-11539 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-11539 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-11539?

CVE-2020-11539 affects Titan Sf Rush Smart Band Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-11539?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-11539 published?

CVE-2020-11539 was published on 2020-04-22 and last updated on 2026-06-17.

CVE-2020-11539

CVE-2020-11539 is a high-severity vulnerability in Titan Sf Rush Smart Band Firmware with a CVSS 3.x base score of 8.1. 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-306.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 4.8
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Titan Sf Rush Smart Band Firmware
Published: 2020-04-22
Last modified: 2026-06-17

Description

An issue was discovered on Tata Sonata Smart SF Rush 1.12 devices. It has been identified that the smart band has no pairing (mode 0 Bluetooth LE security level) The data being transmitted over the air is not encrypted. Adding to this, the data being sent to the smart band doesn't have any authentication or signature verification. Thus, any attacker can control a parameter of the device.

Frequently asked questions

What is CVE-2020-11539?: An issue was discovered on Tata Sonata Smart SF Rush 1.12 devices. It has been identified that the smart band has no pairing (mode 0 Bluetooth LE security level) The data being transmitted over the air is not encrypted. Adding to this, the data being sent to the smart band doesn't have any authentication or signature verification. Thus, any attacker can control a parameter of the device.
How severe is CVE-2020-11539?: CVE-2020-11539 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-11539 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-11539?: CVE-2020-11539 affects Titan Sf Rush Smart Band Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-11539?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-11539 published?: CVE-2020-11539 was published on 2020-04-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:titan:sf_rush_smart_band_firmware:1.12:*:*:*:*:*:*:*

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