No exploitation reportedFix available

CVE-2020-26986

Q: Is CVE-2020-26986 actively exploited?

Active exploitation of CVE-2020-26986 has not been confirmed. Its EPSS score was 3.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2020-26986?

CVE-2020-26986 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2021-01-12
Fixed in13.1.0
WeaknessCWE-122 · CWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability has been identified in JT2Go (All versions < V13.1.0), Teamcenter Visualization (All versions < V13.1.0). Affected applications lack proper validation of user-supplied data when parsing of JT files. This could lead to a heap-based buffer overflow. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-12014)

Timeline

dates in UTC

2021-01-1221:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-26986?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-26986?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Siemens jt2go

Branch	Affected	Fixed in	Source
13.1	< 13.1.0	13.1.0	NVD

Siemens teamcenter visualization

Branch	Affected	Fixed in	Source
13.1	< 13.1.0	13.1.0	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-21-012-03 CISA4 known affected
Siemens JT2Go and Teamcenter Visualization (Update B)
JT2Go: All versions prior to v13.1.0 · Teamcenter Visualization: All versions prior to v13.1.0 · JT2Go: Version 13.1.0. only affected by CVE-2020-26989 CVE-2020-26990 CVE-2020-26991 · +1 more

Full record on NVD

Fix

Update Siemens jt2go to 13.1.0
Vendor fix CISA ICSA-21-012-03 · 4 productsSiemens recommends the following:
Vendor fix CISA ICSA-21-012-03 · 4 productsFor additional information refer to SSA-622830,SSA-663999,and SSA-695540
Vendor fix CISA ICSA-21-012-03 · 4 productsSiemens strongly recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens ' operational guidelines for Industrial Security and follow the recommendations in …
Vendor fix CISA ICSA-21-012-03 · 4 productsAdditional information on industrial security by Siemens can be found at: https://www.siemens.com/Industrialsecurity

Advisories and patches

cert-portal.siemens.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
CNAweakness (CWE)CWE-122read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score3.4 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2021-01-12
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-26986?

Is CVE-2020-26986 actively exploited?

Active exploitation of CVE-2020-26986 has not been confirmed. Its EPSS score was 3.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-26986?

CVE-2020-26986 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Running JT2Go (All versions < V13.1.0)? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database