CVE-2022-27577

mediumpriority · track · 37OT risk · elevatedEPSS 0.014 · 73 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.44% (73rd) EPSS

CVSS 6.4 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · sick_psirt

EPSS · scored 2026-10-27

The vulnerability in the MSC800 in all versions before 4.15 allows for an attacker to predict the TCP initial sequence number. When the TCP sequence is predictable, an attacker can send packets that are forged to appear to come from a trusted computer. These forged packets could compromise services on the MSC800. SICK has released a new firmware version of the SICK MSC800 and recommends updating to the newest version.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedSICK MSC800 with Firmware <4.15sick_psirt
SICK has released a new firmware version of the SICK MSC800 and recommends updating to the newest version.

cvss

Technical severity, 0–10. One row per scoring source.

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 5.4–9.1

v2.06.4mediumAV:N/AC:L/Au:N/C:P/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 4.9

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.2

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Nsecondary · SICK PSIRT DE

v3.18.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-330USprimaryCWE-342USCWE-342US

affected products (4)

Products and version ranges known to be affected.

n/a SICK MSC800≤ All versions before 4.15enisa_euvdEU
sick msc800 firmware< 4.15nvdUScpe:2.3:o:sick:msc800_firmware:*:*:*:*:*:*:*:*
SICK MSC800 with Firmware 4.15all versionsfixedsick_psirtDE
SICK MSC800 with Firmware <4.15all versionssick_psirtDE

advisories (1)

Vendor and ecosystem advisories describing this.

SCA-2022-0006Vulnerability in SICK MSC8002022-04-11csaf · sick_psirtDE
SICK received a report about a vulnerability in the SICK MSC800. An attacker could compromise services on the MSC800 by a TCP sequence prediction attack if a vulnerable version is used.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd sick_psirt NVD CVE.org MITRE

published 2022-04-11modified 2026-06-17

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references (4)

External citations — patches, advisories, analysis.

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