CVE-2021-33973Public exploit

Local privilege escalation via undisclosed buffer overflow

Published Apr 19, 2023 · Updated Feb 5, 2025

Buffer overflow in Qihoo 360 Safe guard 12.1.0.1004, 12.1.0.1005, and 13.1.0.1001 allows local users to escalate privileges. The CVE record and linked disclosure do not identify the affected component, input, or unchecked copy operation behind the overflow. Successful exploitation requires an existing low-privileged local account and grants elevated privileges, although the resulting privilege level is undisclosed.

CVSS severity7.8
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Qihoo 360 Safe guard 12.1.0.1004, 12.1.0.1005, and 13.1.0.1001 allows local users to escalate privileges. The CVE record and linked disclosure do not identify the affected component, input, or unchecked copy operation behind the overflow. Successful exploitation requires an existing low-privileged local account and grants elevated privileges, although the resulting privilege level is undisclosed.

The record

CVE
CVE-2021-33973
Published
Apr 19, 2023
Updated
Feb 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 5, 2025Record 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

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1068Exploitation for Privilege Escalation

Public exploit references

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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