CVE-2020-11166 [Critical] | Out-of-bounds Read in Apq8009 Firmware

Potential out of bound read exception when UE receives unusually large number of padding octets in the beginning of ROHC header in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.29%	0.92%	+0.63%
2	2025-03-30	0.56%	0.29%	-0.27%
3	2025-03-29	—	0.56%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.29%

0.92%

+0.63%

2025-03-30

0.56%

0.29%

-0.27%

2025-03-29

—

0.56%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.1	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. 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:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.2	[email protected]
6.4	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:P/I:N/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. 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:P) Partial availability impact.	10.0	4.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.1

3.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.2

[email protected]

6.4

2.0

MEDIUM

AV:N/AC:L/Au:N/C:P/I:N/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
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:P): Partial availability impact.

10.0

4.9

[email protected]

Affected software / configurations for CVE-2020-11166

Vendor	Product	Version	Raw CPE
qualcomm	apq8009_firmware	—	cpe:2.3:o:qualcomm:apq8009_firmware:-:::::::*
qualcomm	apq8009w_firmware	—	cpe:2.3:o:qualcomm:apq8009w_firmware:-:::::::*
qualcomm	apq8017_firmware	—	cpe:2.3:o:qualcomm:apq8017_firmware:-:::::::*
qualcomm	apq8037_firmware	—	cpe:2.3:o:qualcomm:apq8037_firmware:-:::::::*
qualcomm	apq8053_firmware	—	cpe:2.3:o:qualcomm:apq8053_firmware:-:::::::*
qualcomm	apq8084_firmware	—	cpe:2.3:o:qualcomm:apq8084_firmware:-:::::::*
qualcomm	apq8096au_firmware	—	cpe:2.3:o:qualcomm:apq8096au_firmware:-:::::::*
qualcomm	aqt1000_firmware	—	cpe:2.3:o:qualcomm:aqt1000_firmware:-:::::::*
qualcomm	ar6003_firmware	—	cpe:2.3:o:qualcomm:ar6003_firmware:-:::::::*
qualcomm	ar8151_firmware	—	cpe:2.3:o:qualcomm:ar8151_firmware:-:::::::*
qualcomm	csr6030_firmware	—	cpe:2.3:o:qualcomm:csr6030_firmware:-:::::::*
qualcomm	csrb31024_firmware	—	cpe:2.3:o:qualcomm:csrb31024_firmware:-:::::::*
qualcomm	fsm10055_firmware	—	cpe:2.3:o:qualcomm:fsm10055_firmware:-:::::::*
qualcomm	mdm8207_firmware	—	cpe:2.3:o:qualcomm:mdm8207_firmware:-:::::::*
qualcomm	mdm8215_firmware	—	cpe:2.3:o:qualcomm:mdm8215_firmware:-:::::::*
qualcomm	mdm8215m_firmware	—	cpe:2.3:o:qualcomm:mdm8215m_firmware:-:::::::*
qualcomm	mdm8615m_firmware	—	cpe:2.3:o:qualcomm:mdm8615m_firmware:-:::::::*
qualcomm	mdm9150_firmware	—	cpe:2.3:o:qualcomm:mdm9150_firmware:-:::::::*
qualcomm	mdm9205_firmware	—	cpe:2.3:o:qualcomm:mdm9205_firmware:-:::::::*
qualcomm	mdm9206_firmware	—	cpe:2.3:o:qualcomm:mdm9206_firmware:-:::::::*
qualcomm	mdm9207_firmware	—	cpe:2.3:o:qualcomm:mdm9207_firmware:-:::::::*
qualcomm	mdm9215_firmware	—	cpe:2.3:o:qualcomm:mdm9215_firmware:-:::::::*
qualcomm	mdm9230_firmware	—	cpe:2.3:o:qualcomm:mdm9230_firmware:-:::::::*
qualcomm	mdm9250_firmware	—	cpe:2.3:o:qualcomm:mdm9250_firmware:-:::::::*
qualcomm	mdm9310_firmware	—	cpe:2.3:o:qualcomm:mdm9310_firmware:-:::::::*
qualcomm	mdm9330_firmware	—	cpe:2.3:o:qualcomm:mdm9330_firmware:-:::::::*
qualcomm	mdm9607_firmware	—	cpe:2.3:o:qualcomm:mdm9607_firmware:-:::::::*
qualcomm	mdm9615_firmware	—	cpe:2.3:o:qualcomm:mdm9615_firmware:-:::::::*
qualcomm	mdm9615m_firmware	—	cpe:2.3:o:qualcomm:mdm9615m_firmware:-:::::::*
qualcomm	mdm9625_firmware	—	cpe:2.3:o:qualcomm:mdm9625_firmware:-:::::::*
qualcomm	mdm9628_firmware	—	cpe:2.3:o:qualcomm:mdm9628_firmware:-:::::::*
qualcomm	mdm9630_firmware	—	cpe:2.3:o:qualcomm:mdm9630_firmware:-:::::::*
qualcomm	mdm9635m_firmware	—	cpe:2.3:o:qualcomm:mdm9635m_firmware:-:::::::*
qualcomm	mdm9640_firmware	—	cpe:2.3:o:qualcomm:mdm9640_firmware:-:::::::*
qualcomm	mdm9645_firmware	—	cpe:2.3:o:qualcomm:mdm9645_firmware:-:::::::*
qualcomm	mdm9650_firmware	—	cpe:2.3:o:qualcomm:mdm9650_firmware:-:::::::*
qualcomm	mdm9655_firmware	—	cpe:2.3:o:qualcomm:mdm9655_firmware:-:::::::*
qualcomm	msm8108_firmware	—	cpe:2.3:o:qualcomm:msm8108_firmware:-:::::::*
qualcomm	msm8208_firmware	—	cpe:2.3:o:qualcomm:msm8208_firmware:-:::::::*
qualcomm	msm8209_firmware	—	cpe:2.3:o:qualcomm:msm8209_firmware:-:::::::*
qualcomm	msm8608_firmware	—	cpe:2.3:o:qualcomm:msm8608_firmware:-:::::::*
qualcomm	msm8909w_firmware	—	cpe:2.3:o:qualcomm:msm8909w_firmware:-:::::::*
qualcomm	msm8917_firmware	—	cpe:2.3:o:qualcomm:msm8917_firmware:-:::::::*
qualcomm	msm8920_firmware	—	cpe:2.3:o:qualcomm:msm8920_firmware:-:::::::*
qualcomm	msm8937_firmware	—	cpe:2.3:o:qualcomm:msm8937_firmware:-:::::::*
qualcomm	msm8940_firmware	—	cpe:2.3:o:qualcomm:msm8940_firmware:-:::::::*
qualcomm	msm8953_firmware	—	cpe:2.3:o:qualcomm:msm8953_firmware:-:::::::*
qualcomm	msm8976_firmware	—	cpe:2.3:o:qualcomm:msm8976_firmware:-:::::::*
qualcomm	msm8976sg_firmware	—	cpe:2.3:o:qualcomm:msm8976sg_firmware:-:::::::*
qualcomm	msm8996au_firmware	—	cpe:2.3:o:qualcomm:msm8996au_firmware:-:::::::*
qualcomm	pm215_firmware	—	cpe:2.3:o:qualcomm:pm215_firmware:-:::::::*
qualcomm	pm3003a_firmware	—	cpe:2.3:o:qualcomm:pm3003a_firmware:-:::::::*
qualcomm	pm4125_firmware	—	cpe:2.3:o:qualcomm:pm4125_firmware:-:::::::*
qualcomm	pm4250_firmware	—	cpe:2.3:o:qualcomm:pm4250_firmware:-:::::::*
qualcomm	pm439_firmware	—	cpe:2.3:o:qualcomm:pm439_firmware:-:::::::*
qualcomm	pm456_firmware	—	cpe:2.3:o:qualcomm:pm456_firmware:-:::::::*
qualcomm	pm6125_firmware	—	cpe:2.3:o:qualcomm:pm6125_firmware:-:::::::*
qualcomm	pm6150_firmware	—	cpe:2.3:o:qualcomm:pm6150_firmware:-:::::::*
qualcomm	pm6150a_firmware	—	cpe:2.3:o:qualcomm:pm6150a_firmware:-:::::::*
qualcomm	pm6150l_firmware	—	cpe:2.3:o:qualcomm:pm6150l_firmware:-:::::::*
qualcomm	pm6250_firmware	—	cpe:2.3:o:qualcomm:pm6250_firmware:-:::::::*
qualcomm	pm640a_firmware	—	cpe:2.3:o:qualcomm:pm640a_firmware:-:::::::*
qualcomm	pm640l_firmware	—	cpe:2.3:o:qualcomm:pm640l_firmware:-:::::::*
qualcomm	pm640p_firmware	—	cpe:2.3:o:qualcomm:pm640p_firmware:-:::::::*
qualcomm	pm660_firmware	—	cpe:2.3:o:qualcomm:pm660_firmware:-:::::::*
qualcomm	pm660a_firmware	—	cpe:2.3:o:qualcomm:pm660a_firmware:-:::::::*
qualcomm	pm660l_firmware	—	cpe:2.3:o:qualcomm:pm660l_firmware:-:::::::*
qualcomm	pm670_firmware	—	cpe:2.3:o:qualcomm:pm670_firmware:-:::::::*
qualcomm	pm670l_firmware	—	cpe:2.3:o:qualcomm:pm670l_firmware:-:::::::*
qualcomm	pm7150a_firmware	—	cpe:2.3:o:qualcomm:pm7150a_firmware:-:::::::*
qualcomm	pm7150l_firmware	—	cpe:2.3:o:qualcomm:pm7150l_firmware:-:::::::*
qualcomm	pm7250_firmware	—	cpe:2.3:o:qualcomm:pm7250_firmware:-:::::::*
qualcomm	pm7250b_firmware	—	cpe:2.3:o:qualcomm:pm7250b_firmware:-:::::::*
qualcomm	pm8004_firmware	—	cpe:2.3:o:qualcomm:pm8004_firmware:-:::::::*
qualcomm	pm8005_firmware	—	cpe:2.3:o:qualcomm:pm8005_firmware:-:::::::*
qualcomm	pm8008_firmware	—	cpe:2.3:o:qualcomm:pm8008_firmware:-:::::::*
qualcomm	pm8009_firmware	—	cpe:2.3:o:qualcomm:pm8009_firmware:-:::::::*
qualcomm	pm8018_firmware	—	cpe:2.3:o:qualcomm:pm8018_firmware:-:::::::*
qualcomm	pm8019_firmware	—	cpe:2.3:o:qualcomm:pm8019_firmware:-:::::::*
qualcomm	pm8150_firmware	—	cpe:2.3:o:qualcomm:pm8150_firmware:-:::::::*

References for CVE-2020-11166

URL	Tags
https://www.qualcomm.com/company/product-security/bulletins/march-2021-bulletin	Vendor Advisory

URL

CVE-2020-11166

Exploit prediction scoring system (EPSS) score for CVE-2020-11166

Common vulnerability scoring system (CVSS) metrics for CVE-2020-11166

Weakness enumeration for CVE-2020-11166

Affected software / configurations for CVE-2020-11166

References for CVE-2020-11166