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Full vulnerability report · 2023
CVE-2023-29413High confidence

A CWE-306: Missing Authentication for Critical Function vulnerability exists that could cause Denial-of-Service when accessed by an unauthenticated user on the Schneider UPS Monitor service

Schneider Electric · APC Easy UPS Online Monitoring Software (Windows 10, 11 Windows Server 2016, 2019, 2022)

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
SEVD-2023-101-04 · CSAF 2.0 · revision 4.0.0 · finalSchneider Electric CPCERTEasy UPS Online Monitoring Software
10 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • APC Easy UPS Online Monitoring Software version 2.5-GA-01-22320 and prior installed on Microsoft Windows 10
  • APC Easy UPS Online Monitoring Software version 2.5-GA-01-22320 and prior installed on Microsoft Windows 11
  • APC Easy UPS Online Monitoring Software version 2.5-GA-01-22320 and prior installed on Microsoft Windows Server 2016
  • APC Easy UPS Online Monitoring Software version 2.5-GA-01-22320 and prior installed on Microsoft Windows Server 2019
  • APC Easy UPS Online Monitoring Software version 2.5-GA-01-22320 and prior installed on Microsoft Windows Server 2022
  • Schneider Electric Easy UPS Online Monitoring Software version 2.5-GS-01-22320 and prior installed on Microsoft Windows 10
  • Schneider Electric Easy UPS Online Monitoring Software version 2.5-GS-01-22320 and prior installed on Microsoft Windows 11
  • Schneider Electric Easy UPS Online Monitoring Software version 2.5-GS-01-22320 and prior installed on Microsoft Windows Server 2016
  • Schneider Electric Easy UPS Online Monitoring Software version 2.5-GS-01-22320 and prior installed on Microsoft Windows Server 2019
  • Schneider Electric Easy UPS Online Monitoring Software version 2.5-GS-01-22320 and prior installed on Microsoft Windows Server 2022
Summary
A CWE-306: Missing Authentication for Critical Function vulnerability exists that could cause Denial-of-Service when accessed by an unauthenticated user on the Schneider UPS Monitor service.
Remediation
Version v2.6-GA-01-23116 of Schneider Electric Easy UPS Online Monitoring Software includes a fix for the vulnerabilities for Microsoft supported versions of Windows (10, 11) and Windows Server (2016, 2019, 2022) and is available for direct download here: https://download.schneider-electric.com/files?p_enDocType=Software+- +Release&p_Doc_Ref=APC_install_APC_UPS_windows The Easy UPS Online Monitoring Software has been discontinued coinciding with the discontinuation of the Easy UPS Online SNMP Cards (APV9601, APVS9601) managed by this software. Note: The fix applies to all variants of UPS Online Monitoring Software. It is recommended that customers currently using Easy UPS Online Monitoring Software to manage Easy UPS Online (SRV/SRVS) to transition to PowerChute Serial Shutdown for serial/USB shutdown and monitoring; and to PowerChute Network Shutdown for network shutdown and monitoring. For more information about PowerChute software, please see the following: https://www.apc.com/pcss https://www.apc.com/pcns
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2023-32982

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

A CWE-306: Missing Authentication for Critical Function vulnerability exists that could cause Denial-of-Service when accessed by an unauthenticated user on the Schneider UPS Monitor service.

What

A CWE-306: Missing Authentication for Critical Function vulnerability exists that could cause Denial-of-Service when accessed by an unauthenticated user on the Schneider UPS Monitor service.

Why

A security-sensitive function is reachable without the authentication check that should protect it.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

A CWE-306: Missing Authentication for Critical Function vulnerability exists that could cause Denial-of-Service when accessed by an unauthenticated user on the Schneider UPS Monitor service.

Why

A security-sensitive function is reachable without the authentication check that should protect it.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Missing Authentication for Critical Function → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-306 ↗

CWE-306: Missing Authentication for Critical Function. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-306
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

Cyber Security Agency of Singapore · English · CSA-SB-20230419Security Bulletin 19 Apr 2023

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 19 Apr 2023, published on 19 April 2023. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-0452Multiples vulnérabilités dans les produits Schneider Electric

De multiples vulnérabilités ont été découvertes dans les produits Schneider Electric. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à la confidentialité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-0297Multiples vulnérabilités dans les produits Schneider Electric

De multiples vulnérabilités ont été découvertes dans les produits Schneider Electric. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à l'intégrité des données.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-008890Schneider Electric の APC Easy UPS Online Monitoring Software および Schneider Electric Easy UPS Online Monitoring Software における重要な機能に対する認証の欠如に関する脆弱性

Schneider Electric の APC Easy UPS Online Monitoring Software および Schneider Electric Easy UPS Online Monitoring Software には、重要な機能に対する認証の欠如に関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
Action
Version v2.6-GA-01-23116 of Schneider Electric Easy UPS Online Monitoring Software includes a fix for the vulnerabilities for Microsoft supported versions of Windows (10, 11) and Windows Server (2016, 2019, 2022) and is available for direct download here: https://download.schneider-electric.com/files?p_enDocType=Software+- +Release&p_Doc_Ref=APC_install_APC_UPS_windows The Easy UPS Online Monitoring Software has been discontinued coinciding with the discontinuation of the Easy UPS Online SNMP Cards (APV9601, APVS9601) managed by this software. Note: The fix applies to all variants of UPS Online Monitoring Software. It is recommended that customers currently using Easy UPS Online Monitoring Software to manage Easy UPS Online (SRV/SRVS) to transition to PowerChute Serial Shutdown for serial/USB shutdown and monitoring; and to PowerChute Network Shutdown for network shutdown and monitoring. For more information about PowerChute software, please see the following: https://www.apc.com/pcss https://www.apc.com/pcns
Workaround
A mitigation or workaround reference is available from the source linked below; validate it against the affected product and version.
04

Evidence and provenance

Published 18 Apr 2023 · Last source change 5 Feb 2025, 20:59 UTC · CWE-306 · Missing Authentication for Critical Function

CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2023-32982
Product sourceVendor CSAF · Schneider Electric CPCERT
Remediation sourceVendor CSAF · Schneider Electric CPCERT
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2023-32982↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2023-29413 · cve.blacktree.nl