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Fencer Vulns
high 7.5

CVE-2021-41769 json

A vulnerability has been identified in SIPROTEC 5 6MD85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 6MD86 devices (CPU v…

published 2022-01-11 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-28777

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

A vulnerability has been identified in SIPROTEC 5 6MD85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 6MD86 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 6MD89 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 6MU85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7KE85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7SA82 devices (CPU variant CP100) (All versions < V8.83), SIPROTEC 5 7SA86 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7SA87 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7SD82 devices (CPU variant CP100) (All versions < V8.83), SIPROTEC 5 7SD86 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7SD87 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7SJ81 devices (CPU variant CP100) (All versions < V8.83), SIPROTEC 5 7SJ82 devices (CPU variant CP100) (All versions < V8.83), SIPROTEC 5 7SJ85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7SJ86 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7SK82 devices (CPU variant CP100) (All versions < V8.83), SIPROTEC 5 7SK85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7SL82 devices (CPU variant CP100) (All versions < V8.83), SIPROTEC 5 7SL86 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7SL87 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7SS85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7ST85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7SX85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7UM85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7UT82 devices (CPU variant CP100) (All versions < V8.83), SIPROTEC 5 7UT85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7UT86 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7UT87 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7VE85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 7VK87 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 Compact 7SX800 devices (CPU variant CP050) (All versions < V8.83). An improper input validation vulnerability in the web server could allow an unauthenticated user to access device information.

Patch / fix

  • siemens 6md85_firmware 8.83
  • siemens 6md86_firmware 8.83
  • siemens 6md89_firmware 8.83
  • siemens 6mu85_firmware 8.83
  • siemens 7ke85_firmware 8.83
  • siemens 7sa82_firmware 8.83
  • siemens 7sa86_firmware 8.83
  • siemens 7sa87_firmware 8.83
  • siemens 7sd82_firmware 8.83
  • siemens 7sd86_firmware 8.83
  • siemens 7sd87_firmware 8.83
  • siemens 7sj81_firmware 8.83
  • siemens 7sj82_firmware 8.83
  • siemens 7sj85_firmware 8.83
  • siemens 7sj86_firmware 8.83
  • siemens 7sk82_firmware 8.83
  • siemens 7sk85_firmware 8.83
  • siemens 7sl82_firmware 8.83
  • siemens 7sl86_firmware 8.83
  • siemens 7sl87_firmware 8.83

Vendor advisories

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

cisa ICSA-22-013-04 updated cvss 6.5

Siemens SIPROTEC 5 Devices

  • Siemens SIPROTEC 5 6MD85 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 6MD86 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 6MD89 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 6MU85 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7KE85 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7SA82 devices (CPU variant CP100) <V8.83
    +25 more products
    Siemens SIPROTEC 5 7SA86 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7SA87 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7SD82 devices (CPU variant CP100) <V8.83 Siemens SIPROTEC 5 7SD86 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7SD87 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7SJ81 devices (CPU variant CP100) <V8.83 Siemens SIPROTEC 5 7SJ82 devices (CPU variant CP100) <V8.83 Siemens SIPROTEC 5 7SJ85 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7SJ86 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7SK82 devices (CPU variant CP100) <V8.83 Siemens SIPROTEC 5 7SK85 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7SL82 devices (CPU variant CP100) <V8.83 Siemens SIPROTEC 5 7SL86 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7SL87 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7SS85 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7ST85 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7SX85 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7UM85 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7UT82 devices (CPU variant CP100) <V8.83 Siemens SIPROTEC 5 7UT85 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7UT86 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7UT87 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7VE85 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 7VK87 devices (CPU variant CP300) <V8.83 Siemens SIPROTEC 5 Compact 7SX800 devices (CPU variant CP050) <V8.83
    affected: fixed in V8.83 support.industry.siemens.com

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

Exploit prediction

1.00% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

  • Siemens SIPROTEC 5 6MD85 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 6MD86 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 6MD89 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 6MU85 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7KE85 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7SA82 devices (CPU variant CP100)
  • Siemens SIPROTEC 5 7SA86 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7SA87 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7SD82 devices (CPU variant CP100)
  • Siemens SIPROTEC 5 7SD86 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7SD87 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7SJ81 devices (CPU variant CP100)
  • Siemens SIPROTEC 5 7SJ82 devices (CPU variant CP100)
  • Siemens SIPROTEC 5 7SJ85 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7SJ86 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7SK82 devices (CPU variant CP100)
  • Siemens SIPROTEC 5 7SK85 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7SL82 devices (CPU variant CP100)
  • Siemens SIPROTEC 5 7SL86 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7SL87 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7SS85 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7ST85 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7SX85 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7UM85 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7UT82 devices (CPU variant CP100)
  • Siemens SIPROTEC 5 7UT85 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7UT86 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7UT87 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7VE85 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 7VK87 devices (CPU variant CP300)
  • Siemens SIPROTEC 5 Compact 7SX800 devices (CPU variant CP050)

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

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.