CVE-2022-26782Public exploitNetwork attack vector

Remote code execution via nvram entry overflow

Published May 12, 2022 · Updated Apr 15, 2025

Improper input validation in InRouter302 V3.5.4 allows remote authenticated users to execute code via crafted nvram configuration requests. The httpd user_define_set_item path parses unlimited comma-separated user_define_timeout entries into a 100-element stack array, so excess entries overwrite stack data and the return address. Exploitation requires access to the router's configuration interface; successful corruption can execute attacker-controlled code and affect confidentiality, integrity, and availability.

CVSS severity8.8
High
EPSS probability3.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in InRouter302 V3.5.4 allows remote authenticated users to execute code via crafted nvram configuration requests. The httpd user_define_set_item path parses unlimited comma-separated user_define_timeout entries into a 100-element stack array, so excess entries overwrite stack data and the return address. Exploitation requires access to the router's configuration interface; successful corruption can execute attacker-controlled code and affect confidentiality, integrity, and availability.

The record

CVE
CVE-2022-26782
Published
May 12, 2022
Updated
Apr 15, 2025
Vendor
InHand Networks
Product
InRouter302
Classifications
CWE-787, CWE-20, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 12, 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=V3.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

InHand Networks · InRouter302version=V3.5.4

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.9TalosCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
6.5NVDAV:N/AC:L/Au:S/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)
Vectornetwork
Privilegesauthenticated
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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