CVE-2020-11177

Local security-code overwrite via improper SPC validation

Published Feb 22, 2021 · Updated Aug 4, 2024

Improper access control in Qualcomm Snapdragon platforms allows local users to overwrite the Security Code NV item without the current SPC. The modem RFA path improperly validates the supplied SPC setting and device-lock state before writing the nonvolatile security-code item. A local low-privileged user can therefore replace the stored security code without knowing the existing code; further effects are not publicly specified.

CVSS severity8.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Qualcomm Snapdragon platforms allows local users to overwrite the Security Code NV item without the current SPC. The modem RFA path improperly validates the supplied SPC setting and device-lock state before writing the nonvolatile security-code item. A local low-privileged user can therefore replace the stored security code without knowing the existing code; further effects are not publicly specified.

The record

CVE
CVE-2020-11177
Published
Feb 22, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1556
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1556Modify Authentication Process

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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