CVE-2022-37823Public exploit

Router takeover via unbounded list parsing

Published Aug 25, 2022 · Updated Aug 3, 2024

Stack overflow in Tenda AX1803 1.0.0.1 allows attackers to crash the router or execute code through a crafted list parameter. The formSetVirtualSer handler passes the value to sub_89D3C, where unbounded sscanf conversions write comma-delimited fields into fixed-size stack buffers. A crafted POST to the management endpoint can overwrite control data, producing a service crash or a root shell when program control is hijacked.

CVSS severity7.8
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in Tenda AX1803 1.0.0.1 allows attackers to crash the router or execute code through a crafted list parameter. The formSetVirtualSer handler passes the value to sub_89D3C, where unbounded sscanf conversions write comma-delimited fields into fixed-size stack buffers. A crafted POST to the management endpoint can overwrite control data, producing a service crash or a root shell when program control is hijacked.

The record

CVE
CVE-2022-37823
Published
Aug 25, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 25, 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 privilegesUnavailable in this record.

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

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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