CVE-2022-30055Public exploit

Arbitrary code execution via oversized proxy hostname

Published May 16, 2022 · Updated Aug 3, 2024

Buffer overflow in Prime95 30.7 build 9 allows attackers to execute arbitrary code via an oversized PrimeNet proxy hostname. An oversized value entered in the optional proxy hostname field overwrites EIP after 144 bytes, redirecting execution through libhwloc-15.dll to attacker-controlled bytes. Exploitation requires local GUI interaction and was demonstrated on Windows 7 Professional x86, with code running in the Prime95 user's context.

CVSS severity9.8
Critical
EPSS probability3.88%
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 Prime95 30.7 build 9 allows attackers to execute arbitrary code via an oversized PrimeNet proxy hostname. An oversized value entered in the optional proxy hostname field overwrites EIP after 144 bytes, redirecting execution through libhwloc-15.dll to attacker-controlled bytes. Exploitation requires local GUI interaction and was demonstrated on Windows 7 Professional x86, with code running in the Prime95 user's context.

The record

CVE
CVE-2022-30055
Published
May 16, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution

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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