CVE-2026-9628Public exploitNetwork attack vector

Authenticated service interruption via oversized PPTP settings

Published May 27, 2026 · Updated May 27, 2026

Stack-based buffer overflow in the HiPER 1200GW Web Management Interface 2.5.3-170306 allows remote authenticated users to crash the router. The /goform/formPptpClientConfig handler copies an oversized EncryptionMode value into a fixed stack destination at offset 96 without enforcing its capacity. Digest-authenticated management access is required; the demonstrated request corrupts stack memory and interrupts device service, while code execution remains unverified.

CVSS severity8.8
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in the HiPER 1200GW Web Management Interface 2.5.3-170306 allows remote authenticated users to crash the router. The /goform/formPptpClientConfig handler copies an oversized EncryptionMode value into a fixed stack destination at offset 96 without enforcing its capacity. Digest-authenticated management access is required; the demonstrated request corrupts stack memory and interrupts device service, while code execution remains unverified.

The record

CVE
CVE-2026-9628
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Shanghai Aitai Technology Co., Ltd.
Product
HiPER 1200GW
Classifications
CWE-121, CWE-119, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record 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=2.5.3-170306

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shanghai Aitai Technology Co., Ltd. · HiPER 1200GWversion=2.5.3-170306

Published CVSS scores

7.4VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8VulDBCVSS:3.1/AV:N/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
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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