CVE-2026-4862Public exploitNetwork attack vector

Authenticated service interruption via unchecked GroupName copy

Published Mar 26, 2026 · Updated Mar 26, 2026

Buffer overflow in UTT HiPER 1250GW 3.2.7-210907-180535 and earlier allows remote authenticated users to interrupt router service. The DNS-filter handler copies an attacker-controlled GroupName into the object at offset 168 with strcpy and no length check. Low privileges and network access to the management endpoint are required; the disclosure does not identify whether interruption is a hang, crash, or reboot.

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

Buffer overflow in UTT HiPER 1250GW 3.2.7-210907-180535 and earlier allows remote authenticated users to interrupt router service. The DNS-filter handler copies an attacker-controlled GroupName into the object at offset 168 with strcpy and no length check. Low privileges and network access to the management endpoint are required; the disclosure does not identify whether interruption is a hang, crash, or reboot.

The record

CVE
CVE-2026-4862
Published
Mar 26, 2026
Updated
Mar 26, 2026
Vendor
Shanghai Aitai Technology Co., Ltd.
Product
HiPER 1250GW
Classifications
CWE-119, CWE-120, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 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=3.2.7-210907-180535

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shanghai Aitai Technology Co., Ltd. · HiPER 1250GWversion=3.2.7-210907-180535

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 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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application or System Exploitation

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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