CVE-2025-21477 | Improper Input Validation in Modem

Transient DOS while processing CCCH data when NW sends data with invalid length.

Published: 2025-08-06 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-21477 is rated Low Risk (33.1/100): CVSS High severity, with low exploitation likelihood (EPSS 0.19%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2025-21477

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 0.38% 0.19% -0.19%
2 2026-06-02 0.06% 0.38% +0.32%
3 2025-08-06 — 0.06% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-21477

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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:N)
Doesn’t really leak secrets in a meaningful 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 3.6 [email protected]

Weakness enumeration for CVE-2025-21477

Affected software / configurations for CVE-2025-21477

Vendor Product Version Raw CPE
qualcomm 315_5g_iot_modem_firmware — cpe:2.3:o:qualcomm:315_5g_iot_modem_firmware:-:*:*:*:*:*:*:*
qualcomm ar8035_firmware — cpe:2.3:o:qualcomm:ar8035_firmware:-:*:*:*:*:*:*:*
qualcomm fastconnect_6200_firmware — cpe:2.3:o:qualcomm:fastconnect_6200_firmware:-:*:*:*:*:*:*:*
qualcomm fastconnect_6700_firmware — cpe:2.3:o:qualcomm:fastconnect_6700_firmware:-:*:*:*:*:*:*:*
qualcomm fastconnect_6800_firmware — cpe:2.3:o:qualcomm:fastconnect_6800_firmware:-:*:*:*:*:*:*:*
qualcomm fastconnect_6900_firmware — cpe:2.3:o:qualcomm:fastconnect_6900_firmware:-:*:*:*:*:*:*:*
qualcomm fastconnect_7800_firmware — cpe:2.3:o:qualcomm:fastconnect_7800_firmware:-:*:*:*:*:*:*:*
qualcomm qca6391_firmware — cpe:2.3:o:qualcomm:qca6391_firmware:-:*:*:*:*:*:*:*
qualcomm qca6574a_firmware — cpe:2.3:o:qualcomm:qca6574a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6584au_firmware — cpe:2.3:o:qualcomm:qca6584au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6595au_firmware — cpe:2.3:o:qualcomm:qca6595au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6696_firmware — cpe:2.3:o:qualcomm:qca6696_firmware:-:*:*:*:*:*:*:*
qualcomm qca6698aq_firmware — cpe:2.3:o:qualcomm:qca6698aq_firmware:-:*:*:*:*:*:*:*
qualcomm qca8081_firmware — cpe:2.3:o:qualcomm:qca8081_firmware:-:*:*:*:*:*:*:*
qualcomm qca8337_firmware — cpe:2.3:o:qualcomm:qca8337_firmware:-:*:*:*:*:*:*:*
qualcomm qcc710_firmware — cpe:2.3:o:qualcomm:qcc710_firmware:-:*:*:*:*:*:*:*
qualcomm qcm5430_firmware — cpe:2.3:o:qualcomm:qcm5430_firmware:-:*:*:*:*:*:*:*
qualcomm qcm6490_firmware — cpe:2.3:o:qualcomm:qcm6490_firmware:-:*:*:*:*:*:*:*
qualcomm qcn6024_firmware — cpe:2.3:o:qualcomm:qcn6024_firmware:-:*:*:*:*:*:*:*
qualcomm qcn6224_firmware — cpe:2.3:o:qualcomm:qcn6224_firmware:-:*:*:*:*:*:*:*
qualcomm qcn6274_firmware — cpe:2.3:o:qualcomm:qcn6274_firmware:-:*:*:*:*:*:*:*
qualcomm qcn9024_firmware — cpe:2.3:o:qualcomm:qcn9024_firmware:-:*:*:*:*:*:*:*
qualcomm qcs5430_firmware — cpe:2.3:o:qualcomm:qcs5430_firmware:-:*:*:*:*:*:*:*
qualcomm qcs6490_firmware — cpe:2.3:o:qualcomm:qcs6490_firmware:-:*:*:*:*:*:*:*
qualcomm qcs8550_firmware — cpe:2.3:o:qualcomm:qcs8550_firmware:-:*:*:*:*:*:*:*
qualcomm qfw7114_firmware — cpe:2.3:o:qualcomm:qfw7114_firmware:-:*:*:*:*:*:*:*
qualcomm qfw7124_firmware — cpe:2.3:o:qualcomm:qfw7124_firmware:-:*:*:*:*:*:*:*
qualcomm video_collaboration_vc3_platform_firmware — cpe:2.3:o:qualcomm:video_collaboration_vc3_platform_firmware:-:*:*:*:*:*:*:*
qualcomm sdx55_firmware — cpe:2.3:o:qualcomm:sdx55_firmware:-:*:*:*:*:*:*:*
qualcomm sdx57m_firmware — cpe:2.3:o:qualcomm:sdx57m_firmware:-:*:*:*:*:*:*:*
qualcomm sg8275p_firmware — cpe:2.3:o:qualcomm:sg8275p_firmware:-:*:*:*:*:*:*:*
qualcomm sm7250p_firmware — cpe:2.3:o:qualcomm:sm7250p_firmware:-:*:*:*:*:*:*:*
qualcomm sm7325p_firmware — cpe:2.3:o:qualcomm:sm7325p_firmware:-:*:*:*:*:*:*:*
qualcomm sm7675_firmware — cpe:2.3:o:qualcomm:sm7675_firmware:-:*:*:*:*:*:*:*
qualcomm sm7675p_firmware — cpe:2.3:o:qualcomm:sm7675p_firmware:-:*:*:*:*:*:*:*
qualcomm sm8550p_firmware — cpe:2.3:o:qualcomm:sm8550p_firmware:-:*:*:*:*:*:*:*
qualcomm sm8635_firmware — cpe:2.3:o:qualcomm:sm8635_firmware:-:*:*:*:*:*:*:*
qualcomm sm8635p_firmware — cpe:2.3:o:qualcomm:sm8635p_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_4_gen_1_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_4_gen_1_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_480_5g_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_480_5g_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_480\+_5g_mobile_platform_\(sm4350-ac\)_firmware — cpe:2.3:o:qualcomm:snapdragon_480\+_5g_mobile_platform_\(sm4350-ac\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_690_5g_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_690_5g_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_695_5g_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_695_5g_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_765_5g_mobile_platform_\(sm7250-aa\)_firmware — cpe:2.3:o:qualcomm:snapdragon_765_5g_mobile_platform_\(sm7250-aa\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_765g_5g_mobile_platform_\(sm7250-ab\)_firmware — cpe:2.3:o:qualcomm:snapdragon_765g_5g_mobile_platform_\(sm7250-ab\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_768g_5g_mobile_platform_\(sm7250-ac\)_firmware — cpe:2.3:o:qualcomm:snapdragon_768g_5g_mobile_platform_\(sm7250-ac\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_778g_5g_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_778g_5g_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_778g\+_5g_mobile_platform_\(sm7325-ae\)_firmware — cpe:2.3:o:qualcomm:snapdragon_778g\+_5g_mobile_platform_\(sm7325-ae\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_780g_5g_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_780g_5g_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_782g_mobile_platform_\(sm7325-af\)_firmware — cpe:2.3:o:qualcomm:snapdragon_782g_mobile_platform_\(sm7325-af\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_7c\+_gen_3_compute_firmware — cpe:2.3:o:qualcomm:snapdragon_7c\+_gen_3_compute_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8_gen_1_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_8_gen_1_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8_gen_2_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_8_gen_2_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8_gen_3_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_8_gen_3_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8\+_gen_1_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_8\+_gen_1_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8\+_gen_2_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_8\+_gen_2_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_865_5g_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_865_5g_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_865\+_5g_mobile_platform_\(sm8250-ab\)_firmware — cpe:2.3:o:qualcomm:snapdragon_865\+_5g_mobile_platform_\(sm8250-ab\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_870_5g_mobile_platform_\(sm8250-ac\)_firmware — cpe:2.3:o:qualcomm:snapdragon_870_5g_mobile_platform_\(sm8250-ac\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_888_5g_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_888_5g_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_888\+_5g_mobile_platform_\(sm8350-ac\)_firmware — cpe:2.3:o:qualcomm:snapdragon_888\+_5g_mobile_platform_\(sm8350-ac\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_auto_5g_modem-rf_firmware — cpe:2.3:o:qualcomm:snapdragon_auto_5g_modem-rf_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_auto_5g_modem-rf_gen_2_firmware — cpe:2.3:o:qualcomm:snapdragon_auto_5g_modem-rf_gen_2_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_x55_5g_modem-rf_system_firmware — cpe:2.3:o:qualcomm:snapdragon_x55_5g_modem-rf_system_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_x62_5g_modem-rf_system_firmware — cpe:2.3:o:qualcomm:snapdragon_x62_5g_modem-rf_system_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_x65_5g_modem-rf_system_firmware — cpe:2.3:o:qualcomm:snapdragon_x65_5g_modem-rf_system_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_x70_modem-rf_system_firmware — cpe:2.3:o:qualcomm:snapdragon_x70_modem-rf_system_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_x72_5g_modem-rf_system_firmware — cpe:2.3:o:qualcomm:snapdragon_x72_5g_modem-rf_system_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_x75_5g_modem-rf_system_firmware — cpe:2.3:o:qualcomm:snapdragon_x75_5g_modem-rf_system_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9340_firmware — cpe:2.3:o:qualcomm:wcd9340_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9341_firmware — cpe:2.3:o:qualcomm:wcd9341_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9360_firmware — cpe:2.3:o:qualcomm:wcd9360_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9370_firmware — cpe:2.3:o:qualcomm:wcd9370_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9375_firmware — cpe:2.3:o:qualcomm:wcd9375_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9380_firmware — cpe:2.3:o:qualcomm:wcd9380_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9385_firmware — cpe:2.3:o:qualcomm:wcd9385_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9390_firmware — cpe:2.3:o:qualcomm:wcd9390_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9395_firmware — cpe:2.3:o:qualcomm:wcd9395_firmware:-:*:*:*:*:*:*:*
qualcomm wcn3988_firmware — cpe:2.3:o:qualcomm:wcn3988_firmware:-:*:*:*:*:*:*:*
qualcomm wcn6740_firmware — cpe:2.3:o:qualcomm:wcn6740_firmware:-:*:*:*:*:*:*:*

References for CVE-2025-21477

cvelogic Threat Intelligence