CVE-2021-4217

lowpriority · track · 13EPSS 0.006 · 50 %ileDEEUFRRUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.62% (50th) EPSS
CVSS 3.3 · low
Is it mine?
28 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-28

A flaw was found in unzip. The vulnerability occurs due to improper handling of Unicode strings, which can lead to a null pointer dereference. This flaw allows an attacker to input a specially crafted zip file, leading to a crash or code execution.

01

remediations

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

A vendor fix is available.

  • FixedFirmware < 2025.0.2 installed on AXC F 1152phoenix_contact_psirt

    Update to the latest 2025.0.2 Firmware Release. PHOENIX CONTACT recommends to always use an up-to-date version of the PLCnext Engineer.

  • FixedFirmware < 2025.0.2 installed on AXC F 2152phoenix_contact_psirt

    Update to the latest 2025.0.2 Firmware Release. PHOENIX CONTACT recommends to always use an up-to-date version of the PLCnext Engineer.

  • FixedFirmware < 2025.0.2 installed on AXC F 3152phoenix_contact_psirt

    Update to the latest 2025.0.2 Firmware Release. PHOENIX CONTACT recommends to always use an up-to-date version of the PLCnext Engineer.

  • FixedFirmware < 2025.0.2 installed on BPC 9102Sphoenix_contact_psirt

    Update to the latest 2025.0.2 Firmware Release. PHOENIX CONTACT recommends to always use an up-to-date version of the PLCnext Engineer.

  • FixedFirmware < 2025.0.2 installed on RFC 4072Sphoenix_contact_psirt

    Update to the latest 2025.0.2 Firmware Release. PHOENIX CONTACT recommends to always use an up-to-date version of the PLCnext Engineer.

02

cvss

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

3.3
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.13.3lowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Lprimary · NVD / NIST USexploitability 1.8 · impact 1.4
v3.13.3lowAV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Lsecondary · FSTEC (BDU) RU
v3.13.3lowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Lsecondary · Phoenix Contact PSIRT DE
v3.13.1lowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-476USprimaryCWE-476USCWE-476US
04

affected products (28)

Products and version ranges known to be affected.

showing 20 of 28
05

advisories (3)

Vendor and ecosystem advisories describing this.

  • VDE-2025-053Phoenix Contact: Multiple Vulnerabilities in PLCnext Firmware2025-07-08csaf · phoenix_contact_psirtDE

    Multiple Linux component vulnerabilities fixed in latest PLCnext Firmware release 2025.0.2

  • WID-SEC-W-2022-1335Xerox FreeFlow Print Server: Mehrere SchwachstellenDeutsch2022-09-07csaf · cert_bundDE

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

  • CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
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_psirtcertfrNVDCVE.orgMITRE
published 2022-08-24modified 2026-07-07
09

references (13)

External citations — patches, advisories, analysis.

scry

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