CVE-2021-1918

CVE-2021-1918 is a medium-severity vulnerability in Qualcomm Qca6391 Firmware with a CVSS 3.x base score of 6.5. 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-668.

Key facts

• Severity: Medium (CVSS 3.x base score 6.5)
• CVSS v2: 2.1
• EPSS exploit prediction: 0% (4th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-668
• Affected product: Qualcomm Qca6391 Firmware
• Published: 2022-01-03
• Last modified: 2026-06-17

Description

Improper handling of resource allocation in virtual machines can lead to information exposure in Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile

Frequently asked questions

What is CVE-2021-1918?

Improper handling of resource allocation in virtual machines can lead to information exposure in Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile

How severe is CVE-2021-1918?

CVE-2021-1918 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-1918 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-1918?

CVE-2021-1918 primarily affects Qualcomm Qca6391 Firmware. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-1918?

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

When was CVE-2021-1918 published?

CVE-2021-1918 was published on 2022-01-03 and last updated on 2026-06-17.

References

• https://www.qualcomm.com/company/product-security/bulletins/december-2021-bulletin

Affected products (30)

• cpe:2.3:o:qualcomm:qca6391_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qcm6490_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qcs6490_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qrb5165_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qrb5165n_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd690_5g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd750g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd765_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd765g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd768g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd778g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd888_5g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sm7250p_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sm7325p_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcd9370_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcd9375_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcd9380_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcd9385_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn3988_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn3991_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn3998_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn6750_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn6850_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn6851_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn6855_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn6856_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wsa8810_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wsa8815_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wsa8830_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wsa8835_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Qualcomm Qca6391 Firmware

• CVE-2025-27034 — Critical (CVSS 9.8): Memory corruption while selecting the PLMN from SOR failed list.
• CVE-2025-21483 — Critical (CVSS 9.8): Memory corruption when the UE receives an RTP packet from the network, during the reassembly of NALUs.
• CVE-2023-43552 — Critical (CVSS 9.8): Memory corruption while processing MBSSID beacon containing several subelement IE.
• CVE-2023-33083 — Critical (CVSS 9.8): Memory corruption in WLAN Host while processing RRM beacon on the AP.
• CVE-2023-33082 — Critical (CVSS 9.8): Memory corruption while sending an Assoc Request having BTM Query or BTM Response containing MBO IE.
• CVE-2023-33045 — Critical (CVSS 9.8): Memory corruption in WLAN Firmware while parsing a NAN management frame carrying a S3 attribute.

All CVEs affecting Qualcomm Qca6391 Firmware →

Other CWE-668 (Exposure of Resource to Wrong Sphere) vulnerabilities

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• CVE-2012-1846 — Critical (CVSS 10.0): Google Chrome 17.0.963.66 and earlier allows remote attackers to bypass the sandbox protection mechanism by leveraging…
• CVE-2022-43684 — Critical (CVSS 9.9): ServiceNow has released patches and an upgrade that address an Access Control List (ACL) bypass issue in ServiceNow…
• CVE-2022-24900 — Critical (CVSS 9.9): Piano LED Visualizer is software that allows LED lights to light up as a person plays a piano connected to a computer.…
• CVE-2019-16541 — Critical (CVSS 9.9): Jenkins JIRA Plugin 3.0.10 and earlier does not declare the correct (folder) scope for per-folder Jira site…

Browse all CWE-668 (Exposure of Resource to Wrong Sphere) vulnerabilities →