Page generated: 09 Nov 2026, 02:29 UTC
← Dashboard

CVE-2021-22681

Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key to verify Logix controllers are communicating with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogi…

Read full description
Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key to verify Logix controllers are communicating with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800. Rockwell Automation Studio 5000 Logix Designer Versions 21 and later and RSLogix 5000: Versions 16 through 20 are vulnerable because an unauthenticated attacker could bypass this verification mechanism and authenticate with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800.
CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.8/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 63.63%: +0.32

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 10 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Machine Brief
Press · 31 Jul 2026, 07:00 · 30 MN Water Utilities Hit in Iran-Linked Cyberattack — 7+ States - Machine Brief
Tech Times
Press · 29 Jul 2026, 07:00 · Iranian Hackers Exploited Unpatchable PLC Flaw to Breach 30 Minnesota Water Systems - Tech Times
Tech Times
Press · 23 Jul 2026, 07:00 · Iranian Hackers Infiltrate Siemens and Schneider PLCs, Blinding Operators With Fake Readings - Tech Times
The Record from Recorded Future News
Press · 07 Apr 2026, 07:00 · FBI, Pentagon warn of Iran hacking groups targeting operational technology - The Record from Recorded Future News
SOCRadar
Press · 06 Mar 2026, 08:00 · CISA Flags Hikvision Camera & Rockwell Logix Flaws as - SOCRadar
See all 10 source documents
The Hacker News
Press · 06 Mar 2026, 08:00 · Hikvision and Rockwell Automation CVSS 9.8 Flaws Added to CISA KEV Catalog - The Hacker News
SecurityWeek
Press · 06 Mar 2026, 08:00 · Rockwell Vulnerability Allowing Remote ICS Hacking Exploited in Attacks - SecurityWeek
SecurityWeek
Press · 22 May 2024, 07:00 · Rockwell Automation Urges Customers to Disconnect ICS From Internet - SecurityWeek
The Hacker News
Press · 22 May 2024, 07:00 · Rockwell Advises Disconnecting Internet-Facing ICS Devices Amid Cyber Threats - The Hacker News
The Hacker News
Press · 12 Oct 2022, 07:00 · Critical Bug in Siemens SIMATIC PLCs Could Let Attackers Steal Cryptographic Keys - The Hacker News

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.8 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

1

Public exploit entries / repo candidates

See 1 repos with metrics
RepositoryStarsForksLanguageUpdated
pcrosby-1990/cip-security-poc00Python03 Aug 2026, 22:22
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 63.6%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:23.782764+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
03 Mar 2021, 17:59
First press mention
12 Oct 2022, 07:00
Added to the CISA KEV catalog
05 Mar 2026, 00:00
Latest press mention
31 Jul 2026, 07:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
1 repositories