CVE-2020-11261: Qualcomm Multiple Chipsets Improper Input Validation Vulnerability

How to check if you are exposed to CVE-2020-11261

1. Find every Qualcomm Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
2. Compare each version with the fixed versions in the vendor advisory. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
3. Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2020-11261.

US federal agencies had to fix this by 2022-06-01. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.

Timeline

1. 2021-12-01 · Added to CISA's Known Exploited Vulnerabilities catalog
2. 2022-06-01 · Fix-by date for US federal agencies, passed 1,614 days ago

Weakness type

• CWE-20

More exploited Qualcomm vulnerabilities

CISA lists 12 exploited Qualcomm vulnerabilities. The closest matches:

• CVE-2026-21385Qualcomm Multiple Chipsets Memory Corruption VulnerabilityAdded 2026-03-03
• CVE-2025-27038Qualcomm Multiple Chipsets Use-After-Free VulnerabilityAdded 2025-06-03
• CVE-2025-21480Qualcomm Multiple Chipsets Incorrect Authorization VulnerabilityAdded 2025-06-03
• CVE-2025-21479Qualcomm Multiple Chipsets Incorrect Authorization VulnerabilityAdded 2025-06-03
• CVE-2024-43047Qualcomm Multiple Chipsets Use-After-Free VulnerabilityAdded 2024-10-08
• CVE-2023-33107Qualcomm Multiple Chipsets Integer Overflow VulnerabilityAdded 2023-12-05
• CVE-2023-33106Qualcomm Multiple Chipsets Use of Out-of-Range Pointer Offset VulnerabilityAdded 2023-12-05
• CVE-2023-33063Qualcomm Multiple Chipsets Use-After-Free VulnerabilityAdded 2023-12-05

Keep going

• All exploited CVEs
• Check another CVE
• What is CISA KEV?
• What is EPSS?

Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.