CVE-2025-4677

Service interruption via unexpired idle sessions

Published Jan 7, 2026 · Updated Jan 7, 2026

Insufficient session expiration in ABB WebPro SNMP Card PowerValue and UL 1.1.8.k and earlier allows remote attackers to interrupt service. The firmware leaves idle sessions on TCP ports 23 and 502 open, so repeated unauthenticated connections consume the device's finite connection resources. Network access to the device is required; resource exhaustion makes its services unavailable without disclosing or altering data.

CVSS severity6.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient session expiration in ABB WebPro SNMP Card PowerValue and UL 1.1.8.k and earlier allows remote attackers to interrupt service. The firmware leaves idle sessions on TCP ports 23 and 502 open, so repeated unauthenticated connections consume the device's finite connection resources. Network access to the device is required; resource exhaustion makes its services unavailable without disclosing or altering data.

The record

CVE
CVE-2025-4677
Published
Jan 7, 2026
Updated
Jan 7, 2026
Vendor
GENEREX SYSTEMS Computervertriebsgesellschaft mbH
Product
WebPro SNMP card PowerValue
Classifications
CWE-613, T0814
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 7, 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=0 <=1.1.8.k

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

GENEREX SYSTEMS Computervertriebsgesellschaft mbH · WebPro SNMP card PowerValueversion=0 <=1.1.8.k
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · WebPro SNMP card PowerValue ULversion=0 <=1.1.8.k

Published CVSS scores

7.1ABBCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.5ABBCVSS:3.1/AV:A/AC:L/PR:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-613Insufficient Session Expiration
T0814Denial of Service

Public exploit references

No public exploit references are available in this record.

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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