How severe is CVE-2021-43551?

CVE-2021-43551 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2021-43551 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43551?

CVE-2021-43551 affects Osisoft Pi Vision. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43551?

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

When was CVE-2021-43551 published?

CVE-2021-43551 was published on 2021-11-17 and last updated on 2026-06-17.

CVE-2021-43551

CVE-2021-43551 is a medium-severity vulnerability in Osisoft Pi Vision 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 3.5
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Osisoft Pi Vision
Published: 2021-11-17
Last modified: 2026-06-17

Description

A remote attacker with write access to PI Vision could inject code into a display. Unauthorized information disclosure, modification, or deletion is possible if a victim views or interacts with the infected display using Microsoft Internet Explorer. The impact affects PI System data and other data accessible with victim's user permissions.

Frequently asked questions

What is CVE-2021-43551?: A remote attacker with write access to PI Vision could inject code into a display. Unauthorized information disclosure, modification, or deletion is possible if a victim views or interacts with the infected display using Microsoft Internet Explorer. The impact affects PI System data and other data accessible with victim's user permissions.
How severe is CVE-2021-43551?: CVE-2021-43551 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2021-43551 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43551?: CVE-2021-43551 affects Osisoft Pi Vision. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43551?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43551 published?: CVE-2021-43551 was published on 2021-11-17 and last updated on 2026-06-17.

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-313-05

Affected products (1)

cpe:2.3:a:osisoft:pi_vision:*:*:*:*:*:*:*:*

More vulnerabilities in Osisoft Pi Vision

CVE-2018-7500 — Critical (CVSS 9.8): A Permissions, Privileges, and Access Controls issue was discovered in OSIsoft PI Web API versions 2017 R2 and prior.…
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