No exploitation reported

CVE-2020-6996

No exploitation reported by the sources we read.

Published2020-04-15
WeaknessCWE-121 · 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

Triangle MicroWorks DNP3 Outstation LibrariesDNP3 Outstation .NET Protocol components and DNP3 Outstation ANSI C source code libraries are affected:3.16.00 through 3.25.01. A specially crafted message may cause a stack-based buffer overflow. Authentication is not required to exploit this vulnerability.

Timeline

dates in UTC

2020-04-1519:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 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-2020-6996?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-6996?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Trianglemicroworks dnp3 source code library

Branch	Affected	Fixed in	Source
3.x	≥ 3.16.00, ≤ 3.25.01	no fix published	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-20-105-02 CISA1 known affected
Triangle MicroWorks DNP3 Outstation Libraries
DNP3 Outstation Libraries: 3.16.00 through 3.25.01

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-20-105-02 · 1 productTriangle Microworks recommends users update to Version 3.26.
Mitigation from the vendor CISA ICSA-20-105-02 · 1 productPlease contact Triangle MicroWorks support for additional details.

Detection

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

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
CNAweakness (CWE)CWE-121read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score1.3 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2020-04-15
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-6996?

Is CVE-2020-6996 actively exploited?

Active exploitation of CVE-2020-6996 has not been confirmed. Its EPSS score was 1.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-6996?

CVE-2020-6996 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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