CVE-2021-1896

Weak configuration in WLAN could cause forwarding of unencrypted packets from one client to another in Snapdragon Compute, Snapdragon Connectivity

Published: 2021-07-13 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-1896 is rated Low Risk (19.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.17%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-1896

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.03% 0.17% +0.14%
2 2025-03-17 0.05% 0.03% -0.02%
3 2023-03-07 — 0.05% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-1896

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 1.4 [email protected]
4.3 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 1.4 [email protected]
3.3 2.0 LOW
AV:A/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 6.5 2.9 [email protected]

Weakness enumeration for CVE-2021-1896

Affected software / configurations for CVE-2021-1896

Vendor Product Version Raw CPE
qualcomm aqt1000_firmware — cpe:2.3:o:qualcomm:aqt1000_firmware:-:*:*:*:*:*:*:*
qualcomm qca6164_firmware — cpe:2.3:o:qualcomm:qca6164_firmware:-:*:*:*:*:*:*:*
qualcomm qca6174_firmware — cpe:2.3:o:qualcomm:qca6174_firmware:-:*:*:*:*:*:*:*
qualcomm qca6174a_firmware — cpe:2.3:o:qualcomm:qca6174a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6420_firmware — cpe:2.3:o:qualcomm:qca6420_firmware:-:*:*:*:*:*:*:*
qualcomm qca6430_firmware — cpe:2.3:o:qualcomm:qca6430_firmware:-:*:*:*:*:*:*:*
qualcomm qca9377_firmware — cpe:2.3:o:qualcomm:qca9377_firmware:-:*:*:*:*:*:*:*
qualcomm sc8180x_firmware — cpe:2.3:o:qualcomm:sc8180x_firmware:-:*:*:*:*:*:*:*
qualcomm sd_8c_firmware — cpe:2.3:o:qualcomm:sd_8c_firmware:-:*:*:*:*:*:*:*
qualcomm sd_8cx_firmware — cpe:2.3:o:qualcomm:sd_8cx_firmware:-:*:*:*:*:*:*:*
qualcomm sd7c_firmware — cpe:2.3:o:qualcomm:sd7c_firmware:-:*:*:*:*:*:*:*
qualcomm sd850_firmware — cpe:2.3:o:qualcomm:sd850_firmware:-:*:*:*:*:*:*:*
qualcomm sm6250_firmware — cpe:2.3:o:qualcomm:sm6250_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9340_firmware — cpe:2.3:o:qualcomm:wcd9340_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9341_firmware — cpe:2.3:o:qualcomm:wcd9341_firmware:-:*:*:*:*:*:*:*
qualcomm wcn3990_firmware — cpe:2.3:o:qualcomm:wcn3990_firmware:-:*:*:*:*:*:*:*
qualcomm wcn3991_firmware — cpe:2.3:o:qualcomm:wcn3991_firmware:-:*:*:*:*:*:*:*
qualcomm wcn3998_firmware — cpe:2.3:o:qualcomm:wcn3998_firmware:-:*:*:*:*:*:*:*
qualcomm wcn6850_firmware — cpe:2.3:o:qualcomm:wcn6850_firmware:-:*:*:*:*:*:*:*
qualcomm wsa8810_firmware — cpe:2.3:o:qualcomm:wsa8810_firmware:-:*:*:*:*:*:*:*
qualcomm wsa8815_firmware — cpe:2.3:o:qualcomm:wsa8815_firmware:-:*:*:*:*:*:*:*
qualcomm sdx55_firmware — cpe:2.3:o:qualcomm:sdx55_firmware:-:*:*:*:*:*:*:*

References for CVE-2021-1896

cvelogic Threat Intelligence