How severe is CVE-2021-33727?

CVE-2021-33727 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-33727 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33727?

CVE-2021-33727 primarily affects Siemens Sinec Nms. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33727?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-33727 published?

CVE-2021-33727 was published on 2021-10-12 and last updated on 2026-06-17.

CVE-2021-33727

CVE-2021-33727 is a medium-severity vulnerability in Siemens Sinec Nms with a CVSS 3.x base score of 6.5. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Siemens Sinec Nms
Published: 2021-10-12
Last modified: 2026-06-17

Description

A vulnerability has been identified in SINEC NMS (All versions < V1.0 SP2 Update 1). An authenticated attacker could download the user profile of any user. With this, the attacker could leak confidential information of any user in the affected system.

Frequently asked questions

What is CVE-2021-33727?: A vulnerability has been identified in SINEC NMS (All versions < V1.0 SP2 Update 1). An authenticated attacker could download the user profile of any user. With this, the attacker could leak confidential information of any user in the affected system.
How severe is CVE-2021-33727?: CVE-2021-33727 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-33727 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33727?: CVE-2021-33727 primarily affects Siemens Sinec Nms. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33727?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33727 published?: CVE-2021-33727 was published on 2021-10-12 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-163251.pdf

Affected products (4)

cpe:2.3:a:siemens:sinec_nms:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_nms:1.0:-:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_nms:1.0:sp1:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_nms:1.0:sp2:*:*:*:*:*:*

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