CVE-2021-3796

mediumpriority · track · 30EPSS 0.017 · 78 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.74% (78th) EPSS
CVSS 6.8 · medium
Is it mine?
38 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

vim is vulnerable to Use After Free

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedphoenix_contact_psirt

    Update to the latest LTS Firmware Release.Update to the latest LTS PLCnext Engineer Release.Please check Phoenix Contact PSIRT webpage for further Updates of this Advisory.

  • Mitigationphoenix_contact_psirt

    Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note:Measures to protect network-capable devices with Ethernet connection

02

cvss

Technical severity, 0–10. One row per scoring source.

8.2
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.7–8.2

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4
v3.17.3highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.5
v3.08.2highCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:Lsecondary · ENISA EU
v3.08.2highCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:Lsecondary · security@huntr.devexploitability 2.3 · impact 5.3
v3.16.7mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.17.3highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:Hsecondary · Phoenix Contact PSIRT DE
v3.18.2highAV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:Lsecondary · FSTEC (BDU) RU
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-122USCWE-416USCWE-416USCWE-416US
04

affected products (38)

Products and version ranges known to be affected.

showing 20 of 38
05

advisories (5)

Vendor and ecosystem advisories describing this.

  • VDE-2022-046PHOENIX CONTACT: Multiple Linux component vulnerabilities in PLCnext Firmware2022-11-10csaf · phoenix_contact_psirtDE

    UPDATE A: Two devices (ENERGY AXC PU, SMARTRTU AXC SG) added (24.11.2022) Update for PLCnext Firmware containing fixes for recent vulnerability findings in Linux components and security enhancements. PLCnext Control AXC F x152 is certified according to IEC 62443-4-1 and IEC 62443-4-2. This certification requires that all third-party components used in the firmware are regularly checked for known vulnerabilities.

  • WID-SEC-W-2022-0302Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit AdministratorrechtenDeutsch2022-06-14csaf · cert_bundDE

    Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Xerox FreeFlow Print Server ausnutzen, um beliebigen Programmcode auszuführen, einen Cross-Site-Scripting-Angriff durchzuführen, Informationen offenzulegen, einen Denial-of-Service-Zustand zu verursachen oder Dateien zu manipulieren.

  • WID-SEC-W-2022-0343vim: Schwachstelle ermöglicht Denial of ServiceDeutsch2021-09-15csaf · cert_bundDE

    Ein lokaler Angreifer kann eine Schwachstelle in vim ausnutzen, um einen Denial of Service Angriff durchzuführen.

  • WID-SEC-W-2022-0432Xerox FreeFlow Print Server: Mehrere SchwachstellenDeutsch2022-06-21csaf · cert_bundDE

    Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Xerox FreeFlow Print Server ausnutzen, um die Vertraulichkeit, Verfügbarkeit und Integrität zu gefährden.

  • WID-SEC-W-2024-0794Dell ECS: Mehrere SchwachstellenDeutsch2024-04-04csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Dell ECS ausnutzen, um seine Privilegien zu erweitern, beliebigen Programmcode mit Administratorrechten auszuführen, Informationen offenzulegen, Dateien zu manipulieren, einen Cross-Site-Scripting-Angriff durchzuführen, Sicherheitsvorkehrungen zu umgehen oder einen Denial of Service Zustand herbeizuführen.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundnvdphoenix_contact_psirtNVDCVE.orgMITRE
published 2021-09-15modified 2026-06-17
08

references (48)

External citations — patches, advisories, analysis.

scry

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