How severe is CVE-2022-46353?

CVE-2022-46353 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-46353 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-46353?

CVE-2022-46353 primarily affects Siemens 6gk5204-0ba00-2mb2 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-46353?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2022-46353 published?

CVE-2022-46353 was published on 2022-12-13 and last updated on 2026-06-17.

CVE-2022-46353

CVE-2022-46353 is a critical-severity vulnerability in Siemens 6gk5204-0ba00-2mb2 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-330.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-330
Affected product: Siemens 6gk5204-0ba00-2mb2 Firmware
Published: 2022-12-13
Last modified: 2026-06-17

Description

A vulnerability has been identified in SCALANCE X204RNA (HSR) (All versions < V3.2.7), SCALANCE X204RNA (PRP) (All versions < V3.2.7), SCALANCE X204RNA EEC (HSR) (All versions < V3.2.7), SCALANCE X204RNA EEC (PRP) (All versions < V3.2.7), SCALANCE X204RNA EEC (PRP/HSR) (All versions < V3.2.7). The webserver of affected devices calculates session ids and nonces in an insecure manner. This could allow an unauthenticated remote attacker to brute-force session ids and hijack existing sessions.

Frequently asked questions

What is CVE-2022-46353?: A vulnerability has been identified in SCALANCE X204RNA (HSR) (All versions < V3.2.7), SCALANCE X204RNA (PRP) (All versions < V3.2.7), SCALANCE X204RNA EEC (HSR) (All versions < V3.2.7), SCALANCE X204RNA EEC (PRP) (All versions < V3.2.7), SCALANCE X204RNA EEC (PRP/HSR) (All versions < V3.2.7). The webserver of affected devices calculates session ids and nonces in an insecure manner. This could allow an unauthenticated remote attacker to brute-force session ids and hijack existing sessions.
How severe is CVE-2022-46353?: CVE-2022-46353 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-46353 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-46353?: CVE-2022-46353 primarily affects Siemens 6gk5204-0ba00-2mb2 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-46353?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-46353 published?: CVE-2022-46353 was published on 2022-12-13 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-363821.pdf

Affected products (5)

cpe:2.3:o:siemens:6gk5204-0ba00-2mb2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:6gk5204-0ba00-2kb2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:6gk5204-0bs00-2na3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:6gk5204-0bs00-3la3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:6gk5204-0bs00-3pa3_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Siemens 6gk5204-0ba00-2mb2 Firmware

CVE-2022-46355 — High (CVSS 7.5): A vulnerability has been identified in SCALANCE X204RNA (HSR) (All versions < V3.2.7), SCALANCE X204RNA (PRP) (All…
CVE-2022-46352 — High (CVSS 7.5): A vulnerability has been identified in SCALANCE X204RNA (HSR) (All versions < V3.2.7), SCALANCE X204RNA (PRP) (All…
CVE-2022-46350 — Medium (CVSS 6.1): A vulnerability has been identified in SCALANCE X204RNA (HSR) (All versions < V3.2.7), SCALANCE X204RNA (PRP) (All…
CVE-2022-46351 — Medium (CVSS 5.5): A vulnerability has been identified in SCALANCE X204RNA (HSR) (All versions < V3.2.7), SCALANCE X204RNA (PRP) (All…
CVE-2022-46354 — Medium (CVSS 5.3): A vulnerability has been identified in SCALANCE X204RNA (HSR) (All versions < V3.2.7), SCALANCE X204RNA (PRP) (All…

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