CVE-2023-27807Public exploitNetwork attack vector

Authenticated denial of service via Delstlist overflow

Published Apr 7, 2023 · Updated Feb 12, 2025

Stack overflow in H3C Magic R100 firmware R100V100R005.bin allows remote authenticated users to cause denial of service via /goform/aspForm. The Delstlist handler copies crafted request data into a stack buffer without bounds checking, overwriting stack memory. Remote authenticated users can trigger the overwrite with a crafted payload, interrupting router service without evidence of data disclosure or modification.

CVSS severity4.9
Medium
EPSS probability0.79%
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 H3C Magic R100 firmware R100V100R005.bin allows remote authenticated users to cause denial of service via /goform/aspForm. The Delstlist handler copies crafted request data into a stack buffer without bounds checking, overwriting stack memory. Remote authenticated users can trigger the overwrite with a crafted payload, interrupting router service without evidence of data disclosure or modification.

The record

CVE
CVE-2023-27807
Published
Apr 7, 2023
Updated
Feb 12, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 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 vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.9NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
4.9CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
T1499Endpoint Denial of Service

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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