CVE-2020-28949

PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability

Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks, and thus any other stream-wrapper attack (such as file:// to overwrite files) can still succeed.

CVSS 7.8 KEVPatch available

This record: live connection— last retrieved: 7 November 2026 at 01:04.

Vendor

Festo

Products

FactoryViews, FactoryViews Lite

up to version vers:semver/<1.6.0

Published

19 November 2020

Last modified

17 June 2026

Original source information

Taken directly from NVD, CISA or the vendor — sometimes in English, unchanged from the source.

Technical description

Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks, and thus any other stream-wrapper attack (such as file:// to overwrite files) can still succeed.

CVSS 3.1 — vector details

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack vector

LOCAL

Privileges required

NONE

User interaction

REQUIRED

Confidentiality

High

Integrity

High

Availability

High

EPSS — Exploit Prediction Scoring System

Probability of exploitation within 30 days

84.6%

Percentile

100e

Source: FIRST.org, updated on 6 November 2026.

Patch information

FactoryViews (non-Lite): Upgrade to FactoryViews 1.6.0. See the upgrade guide for information on how to upgrade. FactoryViews Lite: Upgrade to FactoryViews 1.7.0. See the upgrade guide for information on how to upgrade.

IACS Radar assessment

Our own interpretation and context for the source data above.

IACS Radar assessment

Our own interpretation and context for this vulnerability — not an official source.

IACS Radar priority score

98/ 100

Based on CVSS 7.8, EPSS 84.6%, industrial relevance 50/100; raised due to confirmed active exploitation (KEV).

Combines CVSS, EPSS, KEV status, industrial relevance and exposure relevance — a complement to, not a replacement for, the individual scores below and above.

Conditions for exploitation

•Local or adjacent access to the device is required.
•No valid credentials are needed.
•User interaction (for example opening a file) is required.

Operational impact & energy relevance

Possible loss of visibility of or control over the process upon successful exploitation.

No strong energy-sector-specific signals recognised; general OT/ICS relevance.

Additional mitigations

•Apply updates per vendor instructions.

Recommended defensive measures

•Apply the latest firmware or software update and validate its integrity.
•Restrict network access to the affected device to a dedicated OT management segment.
•Implement network segmentation in line with zones and conduits (IEC 62443-3-2).
•Monitor for abnormal protocol traffic using an OT-aware detection system.

Industrial relevance score

50/ 100

• Mentioned in an official CISA ICS advisory, which confirms direct relevance to industrial control systems.
• Included in the CISA KEV catalogue: confirmed evidence of actual exploitation.

Classification is provisional; manual verification by an OT security analyst is recommended.

Classified by IACS Radar-analysepijplijn (geautomatiseerd) on 7 November 2026.

IEC 62443 mapping

IEC 62443-4-1FR3 · Systeemintegriteit

Automatic IACS Radar assessment based on the reported CWE weakness classification; not an official certification statement.

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