A vulnerability has been identified in SIPROTEC 5 6MD85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 6MD86 (CP300) (All versions >=…

published 2023-04-11 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-32401

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits: 0; none known

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.

Patch / fix

fixed in 30

Siemens SIPROTEC 5 6MD85 (CP300) V9.40
Siemens SIPROTEC 5 6MD86 (CP300) V9.40
Siemens SIPROTEC 5 6MD89 (CP300) V9.64
Siemens SIPROTEC 5 6MU85 (CP300) V9.40
Siemens SIPROTEC 5 7KE85 (CP300) V9.40
Siemens SIPROTEC 5 7SA82 (CP100) V8.90
Siemens SIPROTEC 5 7SA82 (CP150) V9.40
Siemens SIPROTEC 5 7SA86 (CP300) V9.40
Siemens SIPROTEC 5 7SA87 (CP300) V9.40
Siemens SIPROTEC 5 7SD82 (CP100) V8.90
Siemens SIPROTEC 5 7SD82 (CP150) V9.40
Siemens SIPROTEC 5 7SD86 (CP300) V9.40
Siemens SIPROTEC 5 7SD87 (CP300) V9.40
Siemens SIPROTEC 5 7SJ81 (CP100) V8.89
Siemens SIPROTEC 5 7SJ81 (CP150) V9.40
Siemens SIPROTEC 5 7SJ82 (CP100) V8.89
Siemens SIPROTEC 5 7SJ82 (CP150) V9.40
Siemens SIPROTEC 5 7SJ85 (CP300) V9.40
Siemens SIPROTEC 5 7SJ86 (CP300) V9.40
Siemens SIPROTEC 5 7SK82 (CP100) V8.89
Siemens SIPROTEC 5 7SK82 (CP150) V9.40
Siemens SIPROTEC 5 7SK85 (CP300) V9.40
Siemens SIPROTEC 5 7SL82 (CP100) V8.90
Siemens SIPROTEC 5 7SL82 (CP150) V9.40
Siemens SIPROTEC 5 7SL86 (CP300) V9.40
Siemens SIPROTEC 5 7SL87 (CP300) V9.40
Siemens SIPROTEC 5 7SS85 (CP300) V9.40
Siemens SIPROTEC 5 7ST85 (CP300) V9.64
Siemens SIPROTEC 5 7ST86 (CP300) V9.40
Siemens SIPROTEC 5 7SX82 (CP150) V9.40

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-23-103-06 updated 2025-11-11 cvss 7.5

Siemens SIPROTEC 5 Devices

Siemens SIPROTEC 5 6MD85 (CP300) >= 7.80, < 9.40 Siemens SIPROTEC 5 6MD86 (CP300) >= 7.80, < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 6MD89 (CP300) >= 7.80, < 9.64
affected: fixed in V9.64, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 6MU85 (CP300) >= 7.80, < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7KE85 (CP300) >= 7.80, < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SA82 (CP100) < 8.90
affected: fixed in V8.90, mitigation
Siemens SIPROTEC 5 7SA82 (CP150) < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SA86 (CP300) >= 7.80, < 9.40 Siemens SIPROTEC 5 7SA87 (CP300) >= 7.80, < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SD82 (CP100) < 8.90
affected: fixed in V8.90, mitigation

show 20 more

Siemens SIPROTEC 5 7SD82 (CP150) < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SD86 (CP300) >= 7.80, < 9.40 Siemens SIPROTEC 5 7SD87 (CP300) >= 7.80, < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SJ81 (CP100) < 8.89
affected: fixed in V8.89, mitigation
Siemens SIPROTEC 5 7SJ81 (CP150) < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SJ82 (CP100) < 8.89
affected: fixed in V8.89, mitigation
Siemens SIPROTEC 5 7SJ82 (CP150) < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SJ85 (CP300) >= 7.80, < 9.40 Siemens SIPROTEC 5 7SJ86 (CP300) >= 7.80, < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SK82 (CP100) < 8.89
affected: fixed in V8.89, mitigation
Siemens SIPROTEC 5 7SK82 (CP150) < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SK85 (CP300) >= 7.80, < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SL82 (CP100) < 8.90
affected: fixed in V8.90, mitigation
Siemens SIPROTEC 5 7SL82 (CP150) < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SL86 (CP300) >= 7.80, < 9.40 Siemens SIPROTEC 5 7SL87 (CP300) >= 7.80, < 9.40 Siemens SIPROTEC 5 7SS85 (CP300) >= 7.80, < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7ST85 (CP300) >= 7.80, < 9.64
affected: fixed in V9.64, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7ST86 (CP300) >= 7.80, < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SX82 (CP150) < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7SX85 (CP300) >= 7.80, < 9.40 Siemens SIPROTEC 5 7UM85 (CP300) >= 7.80, < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7UT82 (CP100) < 8.90
affected: fixed in V8.90, mitigation
Siemens SIPROTEC 5 7UT82 (CP150) < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com
Siemens SIPROTEC 5 7UT85 (CP300) >= 7.80, < 9.40 Siemens SIPROTEC 5 7UT86 (CP300) >= 7.80, < 9.40 Siemens SIPROTEC 5 7UT87 (CP300) >= 7.80, < 9.40 Siemens SIPROTEC 5 7VE85 (CP300) >= 7.80, < 9.40 Siemens SIPROTEC 5 7VK87 (CP300) >= 7.80, < 9.40 Siemens SIPROTEC 5 7VU85 (CP300) >= 7.80, < 9.40
affected: fixed in V9.40, mitigation support.industry.siemens.com

4 more affected in the full advisory

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Siemens SIPROTEC 5 6MD85 (CP300)
Siemens SIPROTEC 5 6MD86 (CP300)
Siemens SIPROTEC 5 6MD89 (CP300)
Siemens SIPROTEC 5 6MU85 (CP300)
Siemens SIPROTEC 5 7KE85 (CP300)
Siemens SIPROTEC 5 7SA82 (CP100)
Siemens SIPROTEC 5 7SA82 (CP150)
Siemens SIPROTEC 5 7SA86 (CP300)
Siemens SIPROTEC 5 7SA87 (CP300)
Siemens SIPROTEC 5 7SD82 (CP100)
Siemens SIPROTEC 5 7SD82 (CP150)
Siemens SIPROTEC 5 7SD86 (CP300)
Siemens SIPROTEC 5 7SD87 (CP300)
Siemens SIPROTEC 5 7SJ81 (CP100)
Siemens SIPROTEC 5 7SJ81 (CP150)
Siemens SIPROTEC 5 7SJ82 (CP100)
Siemens SIPROTEC 5 7SJ82 (CP150)
Siemens SIPROTEC 5 7SJ85 (CP300)
Siemens SIPROTEC 5 7SJ86 (CP300)
Siemens SIPROTEC 5 7SK82 (CP100)
Siemens SIPROTEC 5 7SK82 (CP150)
Siemens SIPROTEC 5 7SK85 (CP300)
Siemens SIPROTEC 5 7SL82 (CP100)
Siemens SIPROTEC 5 7SL82 (CP150)
Siemens SIPROTEC 5 7SL86 (CP300)
Siemens SIPROTEC 5 7SL87 (CP300)
Siemens SIPROTEC 5 7SS85 (CP300)
Siemens SIPROTEC 5 7ST85 (CP300)
Siemens SIPROTEC 5 7ST86 (CP300)
Siemens SIPROTEC 5 7SX82 (CP150)
Siemens SIPROTEC 5 7SX85 (CP300)
Siemens SIPROTEC 5 7UM85 (CP300)
Siemens SIPROTEC 5 7UT82 (CP100)
Siemens SIPROTEC 5 7UT82 (CP150)
Siemens SIPROTEC 5 7UT85 (CP300)
Siemens SIPROTEC 5 7UT86 (CP300)
Siemens SIPROTEC 5 7UT87 (CP300)
Siemens SIPROTEC 5 7VE85 (CP300)
Siemens SIPROTEC 5 7VK87 (CP300)
Siemens SIPROTEC 5 7VU85 (CP300)
Siemens SIPROTEC 5 Communication Module ETH-BA-2EL (Rev.1)
Siemens SIPROTEC 5 Communication Module ETH-BB-2FO (Rev. 1)
Siemens SIPROTEC 5 Communication Module ETH-BD-2FO
Siemens SIPROTEC 5 Compact 7SX800 (CP050)

Classification

Weakness

CWE-476 NULL Pointer Dereference

References

Sources

CVE List CVE-2023-28766
NVD CVE-2023-28766

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary