CVE-2021-1906 Qualcomm CVE debrief

Who should care

Security and device-management teams responsible for Qualcomm-based phones, tablets, embedded devices, and other products that may incorporate affected chipsets. OEMs, carriers, fleet operators, and patch-management teams should also treat this as a priority because CISA listed it in the Known Exploited Vulnerabilities catalog.

Technical summary

The available official description identifies CVE-2021-1906 as a Qualcomm Multiple Chipsets 'Detection of Error Condition Without Action' vulnerability. CISA included it in the Known Exploited Vulnerabilities catalog on 2021-11-03 with a remediation due date of 2021-11-17, indicating active exploitation or sufficient evidence of exploitation concern. Public records provided here do not include CVSS, attack vector, or product-version granularity, so defenders should rely on vendor advisories and downstream OEM guidance to determine exposure and remediation steps.

Defensive priority

High. KEV inclusion means this issue should be treated as a top remediation item, especially where Qualcomm-based devices are present and vendor updates are available.

Recommended defensive actions

• Inventory assets that use Qualcomm chipsets or Qualcomm-based OEM products.
• Check vendor and OEM advisories to confirm whether any deployed models or software versions are affected.
• Apply updates per vendor instructions as soon as feasible, prioritizing internet-facing and high-value devices.
• Track remediation against the CISA KEV due date context and verify patch completion across fleets.
• If immediate patching is not possible, apply compensating controls recommended by the vendor and reduce exposure where practical.

Evidence notes

This debrief is based only on the supplied official records: the CISA Known Exploited Vulnerabilities catalog entry and the linked official CVE/NVD records. The corpus confirms vendor, product family, KEV status, date added, and vendor-directed remediation, but does not provide CVSS scoring or additional technical exploitation details. No unsupported impact claims are made.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.