EUVD-2026-52735
GHSA-7wmw-jvfp-wgm7
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Cellular MitM via rogue base station demands RF proximity and specialized hardware (AV:A, AC:H); no authentication or user interaction required; impact is confidentiality-only with no integrity or availability consequence.
Primary rating from Vendor (qualcomm).
CVSS VectorVendor: qualcomm
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
2DescriptionCVE.org
Weak configuration when UE does not verify the consistency of its additional security capabilities with the replayed capabilities.
AnalysisAI
Qualcomm Snapdragon chipsets fail to verify the consistency of UE security capabilities against those replayed by the network during 3GPP cellular security mode negotiation, enabling a rogue base station operator to force downgraded cryptographic algorithm selection on unpatched devices. The flaw resides in the cellular modem firmware stack and affects all Snapdragon product lines per available CPE data, with no minimum version boundary published. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an attacker to physically operate a rogue cellular base station (false eNB or gNB) with sufficient RF signal strength to attract the target device's connection, establishing a radio-layer Man-in-the-Middle position during the 3GPP security mode command procedure. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Qualcomm's CVSS 7.5 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) rates this as high severity with low attack complexity - however, this vector warrants scrutiny. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker operating a rogue LTE or 5G base station in physical proximity to a target Snapdragon-equipped device broadcasts a stronger signal than the legitimate network, causing the UE to camp on the attacker's cell. During the security mode command exchange, the attacker intercepts the UE's security capability advertisement and replays a modified version that suppresses stronger algorithm support, advertising only weaker or null ciphering options. … |
| Remediation | The primary fix is to apply the patched modem firmware delivered through Qualcomm's August 2026 Security Bulletin (https://docs.qualcomm.com/product/publicresources/securitybulletin/august-2026-bulletin.html). … Detailed patch versions, workarounds, and compensating controls in full report. |
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Within 24 hours, conduct a rapid assessment of Snapdragon device inventory across the organization, prioritizing high-risk users who handle sensitive data. …
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External POC / Exploit Code
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