How severe is CVE-2020-26999?

CVE-2020-26999 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-26999 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26999?

CVE-2020-26999 primarily affects Siemens Jt2go. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-26999?

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

When was CVE-2020-26999 published?

CVE-2020-26999 was published on 2021-02-09 and last updated on 2026-06-17.

CVE-2020-26999

CVE-2020-26999 is a high-severity vulnerability in Siemens Jt2go with a CVSS 3.x base score of 7.8. 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-125.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Siemens Jt2go
Published: 2021-02-09
Last modified: 2026-06-17

Description

A vulnerability has been identified in JT2Go (All versions < V13.1.0.2), Teamcenter Visualization (All versions < V13.1.0.2). Affected applications lack proper validation of user-supplied data when parsing of PAR files. This could result in a memory access past the end of an allocated buffer. An attacker could leverage this vulnerability to leak information. (ZDI-CAN-12042)

Frequently asked questions

What is CVE-2020-26999?: A vulnerability has been identified in JT2Go (All versions < V13.1.0.2), Teamcenter Visualization (All versions < V13.1.0.2). Affected applications lack proper validation of user-supplied data when parsing of PAR files. This could result in a memory access past the end of an allocated buffer. An attacker could leverage this vulnerability to leak information. (ZDI-CAN-12042)
How severe is CVE-2020-26999?: CVE-2020-26999 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-26999 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26999?: CVE-2020-26999 primarily affects Siemens Jt2go. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-26999?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-26999 published?: CVE-2020-26999 was published on 2021-02-09 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:siemens:jt2go:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:teamcenter_visualization:*:*:*:*:*:*:*:*

More vulnerabilities in Siemens Jt2go

CVE-2020-26996 — High (CVSS 8.8): A vulnerability has been identified in JT2Go (All versions < V13.1.0), Teamcenter Visualization (All versions <…
CVE-2020-26995 — High (CVSS 8.8): A vulnerability has been identified in JT2Go (All versions < V13.1.0), Teamcenter Visualization (All versions <…
CVE-2020-26994 — High (CVSS 8.8): A vulnerability has been identified in JT2Go (All versions < V13.1.0), Teamcenter Visualization (All versions <…
CVE-2020-26991 — High (CVSS 8.8): A vulnerability has been identified in JT2Go (All versions < V13.1.0.2), Teamcenter Visualization (All versions <…
CVE-2020-26990 — High (CVSS 8.8): A vulnerability has been identified in JT2Go (All versions < V13.1.0.1), Teamcenter Visualization (All versions <…
CVE-2020-26988 — High (CVSS 8.8): A vulnerability has been identified in JT2Go (All versions < V13.1.0), Teamcenter Visualization (All versions <…

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