# Tenable

Type: Company

Source: Cyber Intelligence Brief — https://getcyberbrief.com/entity/tenable
Canonical HTML page: https://getcyberbrief.com/entity/tenable

## Timeline

- **2026-07-31**: Tenable Attributes to Iran — Tenable researchers publicly conclude the attack bears the hallmarks of CyberAv3ngers, an IRGC-linked group.
- **2026-07-28**: CISA Alert Issued — CISA warns of active password manipulation attempts on PLCs and urges water utilities to disconnect from the internet.
- **2026-07-27**: Second Wave and Shutdown in Braham — Additional intrusions occur; the Braham water treatment facility temporarily shuts down due to compromised PLCs.
- **2026-07-26**: Initial Wave of Cyberattacks — Attackers begin targeting multiple water system PLCs across Minnesota, modifying passwords to disrupt operations.
- **2026-03-13**: Market Disclosure — Financial news outlets confirm the transaction details via SEC Form 4 filings.
- **2026-03-11**: CFO Stock Sale — Joo Mi Kim offloads 6,799 shares worth $873,000.
- **2026-02-20**: Market Shift Analysis — Industry reports highlight challenges in the 'shift left' security movement.
- **2026-02-05**: Earnings Report — Qualys files results of operations and financial condition with the SEC.

## Recent coverage (4 stories)

### 30+ water systems hit: CISA warns of PLC password manipulation in Iran-linked hack
2026-07-31 04:28:19 · Sentiment: Negative · Impact: 6/10 · Sources: 2

Attackers targeted PLCs across Minnesota water utilities, altering passwords to lock operators out and forcing emergency shutdowns. Tenable researchers tied the activity to the IRGC affiliate CyberAv3ngers, while CISA issued urgent patch guidance. The incident exposes systemic OT weaknesses in small and mid-sized water providers.
Full story: https://getcyberbrief.com/story/iran-cyber-water-plc-attack-2026

### Tenable, Okta Fall 6%+ as AI Fears Hit Cybersecurity Stocks
2026-07-25 13:20:22 · Sentiment: Neutral · Impact: 5/10 · Sources: 1

Cybersecurity stocks Tenable and Okta tumbled in a broad software sell-off driven by AI disruption fears. The decline comes despite rising cyber threats, creating a paradox for investors.
Full story: https://getcyberbrief.com/story/tenable-okta-fall-ai-software-selloff-2026

### Tenable Unveils Hexa AI: Agentic Engine to Automate Security Workflows
2026-03-24 17:36:39 · Sentiment: Strongly positive · Impact: 7/10 · Sources: 2

Tenable has launched Hexa AI, an agentic engine integrated into its Tenable One platform designed to automate complex security workflows. By orchestrating specialized AI agents, the system aims to bridge the gap between exposure identification and risk remediation.
Full story: https://getcyberbrief.com/story/tenable-hexa-ai-launch-rsa-2026

### Qualys CFO Offloads $873,000 in Stock Amid Vulnerability Market Shifts
2026-03-13 08:28:15 · Sentiment: Neutral · Impact: 5/10 · Sources: 2

Qualys Chief Financial Officer Joo Mi Kim has sold 6,799 shares of the company's common stock, a transaction valued at approximately $873,000. This insider activity occurs as the cloud security firm faces intensifying competition in the vulnerability management sector and navigates broader enterprise shifts toward AI-driven security operations.
Full story: https://getcyberbrief.com/story/qualys-cfo-stock-sale-analysis

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This page is a machine-readable summary. Sentiment measures the directional read of each development for this entity, not the tone of the reporting; impact weights consequence, not syndication reach. See https://getcyberbrief.com/guides/methodology for the full editorial methodology.