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CVE-2023-21631

Improper Input Validation in Modem

7.5 High

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

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
None

Exploit likelihood

0.36%Up 0.3 points since Jul 4, 2023
90%50%10%1%

What each source reports

CVE List Score used 7.5

Improper Input Validation in Modem

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

Record
CVE-2023-21631
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness
CWE-20
Updated
2026-11-02
EUVDEUVD-2023-25798 7.5

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

Record
EUVD-2023-25798
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-ccv7-j4hv-3wgx 7.5

Weak Configuration due to improper input validation in Modem while processing LTE security mode...

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

Record
GHSA-ccv7-j4hv-3wgx
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness
CWE-20
Updated
2026-11-02
NVD 7.5

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

Record
CVE-2023-21631
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-20
Updated
2026-11-02

Affected products

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History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-21631 is a high vulnerability (CVSS 7.5) in Qualcomm 205 Firmware, published July 4, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.36%, the 30th percentile. No source names a fixed version.

References

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