CVE-2023-21631

CVE-2023-21631 is a high-severity vulnerability in Qualcomm 315 5g Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• EPSS exploit prediction: 0% (28th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-20
• Affected product: Qualcomm 315 5g Firmware
• Published: 2023-07-04
• Last modified: 2026-06-17

Description

Weak Configuration due to improper input validation in Modem while processing LTE security mode command message received from network.

Frequently asked questions

What is CVE-2023-21631?

Weak Configuration due to improper input validation in Modem while processing LTE security mode command message received from network.

How severe is CVE-2023-21631?

CVE-2023-21631 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2023-21631 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-21631?

CVE-2023-21631 primarily affects Qualcomm 315 5g Firmware. In total, 160 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-21631?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-21631 published?

CVE-2023-21631 was published on 2023-07-04 and last updated on 2026-06-17.

References

• https://www.qualcomm.com/company/product-security/bulletins/july-2023-bulletin

Affected products (160)

• cpe:2.3:o:qualcomm:315_5g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:9205_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:apq8017_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:apq8037_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:aqt1000_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:ar8035_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:c-v2x_9150_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:csra6620_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:csra6640_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:csrb31024_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:fastconnect_6200_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:fastconnect_6700_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:fastconnect_6800_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:fastconnect_6900_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:fastconnect_7800_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:mdm9628_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:msm8108_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:msm8209_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:msm8608_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:msm8909w_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca4004_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6174a_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6391_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6420_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6421_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6426_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6430_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6431_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6436_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6564a_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6564au_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6574a_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6574au_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6595au_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6696_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6698aq_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca8081_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca8337_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca9377_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qcm2290_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Qualcomm 315 5g Firmware

• CVE-2023-33015 — High (CVSS 7.5): Transient DOS in WLAN Firmware while interpreting MBSSID IE of a received beacon frame.
• CVE-2023-21629 — Medium (CVSS 6.8): Memory Corruption in Modem due to double free while parsing the PKCS15 sim files.

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