HOMEVULNERABILITIESCVE-2021-1919
CRITICAL

CVE-2021-1919

CWE-191Published: September 8, 2021· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

Integer underflow can occur when the RTCP length is lesser than than the actual blocks present in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Voice & Music, Snapdragon Wearables

NVD Source

Technical Analysis

CVE-2021-1919 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Qualcomm310 product(s)
apq8009 firmwareapq8009apq8009w firmwareapq8009wapq8017 firmwareapq8017apq8037 firmwareapq8037apq8053 firmwareapq8053apq8084 firmwareapq8084+298
Source: NVD CPE · 310 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.qualcomm.com/company/product-security/bulletins/august-2021-bulletin
ADVISORYhttps://www.qualcomm.com/company/product-security/bulletins/august-2021-bulletin

All References (2)

→
https://www.qualcomm.com/company/product-security/bulletins/august-2021-bulletinVendor Advisory
→
https://www.qualcomm.com/company/product-security/bulletins/august-2021-bulletinVendor Advisory

Quick Facts

CVE IDCVE-2021-1919
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-191
CISA KEVNo
Affected1 vendor(s)
PublishedSep 8, 2021

Related CVEs (CWE-191)

CVE-2007-0063
10.0
CVE-2018-11930
9.8
CVE-2015-9198
9.8
CVE-2018-14353
9.8
CVE-2015-9167
9.8
CVE-2019-2244
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-1919 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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