CVE & CISA-KEV Catalog

CVE-2023-28766

HIGH
7.5
CVSS v3
NVD

Description

A vulnerability has been identified in SIPROTEC 5 6MD85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 6MD86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 6MD89 (CP300) (All versions >= V7.80 < V9.64), SIPROTEC 5 6MU85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7KE85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SA82 (CP100) (All versions < V8.90), SIPROTEC 5 7SA82 (CP150) (All versions < V9.40), SIPROTEC 5 7SA86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SA87 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SD82 (CP100) (All versions < V8.90), SIPROTEC 5 7SD82 (CP150) (All versions < V9.40), SIPROTEC 5 7SD86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SD87 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SJ81 (CP100) (All versions < V8.89), SIPROTEC 5 7SJ81 (CP150) (All versions < V9.40), SIPROTEC 5 7SJ82 (CP100) (All versions < V8.89), SIPROTEC 5 7SJ82 (CP150) (All versions < V9.40), SIPROTEC 5 7SJ85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SJ86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SK82 (CP100) (All versions < V8.89), SIPROTEC 5 7SK82 (CP150) (All versions < V9.40), SIPROTEC 5 7SK85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SL82 (CP100) (All versions < V8.90), SIPROTEC 5 7SL82 (CP150) (All versions < V9.40), SIPROTEC 5 7SL86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SL87 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SS85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7ST85 (CP300) (All versions >= V7.80 < V9.64), SIPROTEC 5 7ST86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SX82 (CP150) (All versions < V9.40), SIPROTEC 5 7SX85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7UM85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7UT82 (CP100) (All versions < V8.90), SIPROTEC 5 7UT82 (CP150) (All versions < V9.40), SIPROTEC 5 7UT85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7UT86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7UT87 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7VE85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7VK87 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7VU85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 Communication Module ETH-BA-2EL (Rev.1) (All versions < V9.40 installed on CP150 and CP300 devices), SIPROTEC 5 Communication Module ETH-BA-2EL (Rev.1) (All versions < V8.89 installed on CP100 devices), SIPROTEC 5 Communication Module ETH-BB-2FO (Rev. 1) (All versions < V9.40 installed on CP150 and CP300 devices), SIPROTEC 5 Communication Module ETH-BB-2FO (Rev. 1) (All versions < V8.89 installed on CP100 devices), SIPROTEC 5 Communication Module ETH-BD-2FO (All versions < V9.40), SIPROTEC 5 Compact 7SX800 (CP050) (All versions < V9.40). Affected devices lack proper validation of http request parameters of the hosted web service. An unauthenticated remote attacker could send specially crafted packets that could cause denial of service condition of the target device.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available
siprotec 5 6md85 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 6md86 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 6mu85 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7ke85 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sa82 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sa86 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sa87 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sd82 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sd86 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sd87 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sj81 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sj82 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sj85 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sj86 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sk82 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sk85 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sl82 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sl86 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sl87 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7ss85 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sx82 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7sx85 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7um85 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7ut82 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7ut85 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7ut86 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7ut87 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7ve85 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7vk87 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 7vu85 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 communication module ethba2el firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 communication module ethbb2fo firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 communication module ethbd2fo firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD
siprotec 5 compact 7sx800 firmwareNVD
Affected:< 9.40Fixed in:9.40CVE-2023-28766derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.94%probability of exploitation in 30 days
56thpercentile

Moderate risk: more likely to be exploited than 56% of all known CVEs.

References

Vendor Advisory1
Other references1

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-21758High7.592%-Fix
CVE-2023-21547High7.588%-Fix
CVE-2014-3470Medium4.386%-Fix
CVE-2021-44224High8.282%-Fix
CVE-2016-0742High7.582%-Fix
CVE-2009-1386Medium5.080%-Fix
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CVE-2023-28766 severity badge

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-11.