CVE-2022-28664Public exploitNetwork attack vector

Memory corruption via truncated percent escape

Published Aug 5, 2022 · Updated Apr 15, 2025

Out-of-bounds memory access in FreshTomato 2022.1 allows remote attackers to corrupt memory via a crafted HTTP request. The MIPS httpd unescape function assumes each percent sign has two following characters, causing an out-of-bounds read and write when either is missing. No authentication or user interaction is required, but public evidence establishes memory corruption rather than code execution or a specific service failure.

CVSS severity9.8
Critical
EPSS probability1.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds memory access in FreshTomato 2022.1 allows remote attackers to corrupt memory via a crafted HTTP request. The MIPS httpd unescape function assumes each percent sign has two following characters, causing an out-of-bounds read and write when either is missing. No authentication or user interaction is required, but public evidence establishes memory corruption rather than code execution or a specific service failure.

The record

CVE
CVE-2022-28664
Published
Aug 5, 2022
Updated
Apr 15, 2025
Vendor
FreshTomato Project
Product
FreshTomato
Classifications
CWE-787, CWE-20, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2022.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreshTomato Project · FreshTomatoversion=2022.1

Published CVSS scores

9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.3Cisco TalosCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

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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