Session ID Predictability Enables Authentication Bypass

A vulnerability has been identified in Reyrolle 7SR5 (All versions < V2.70). Information is exposed through the web interface that can be used to calculate the current and past session ID numbers. This could allow an attacker to bypass the authentication and gain unauthorized access to the device.

Casky was already ahead

This CVE exploits attack patterns that Casky's 283matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

CVE-2026-62645 represents a critical authentication weakness in Reyrolle 7SR5 devices below version 2.70, where the web interface inadvertently exposes information allowing attackers to predict current and historical session IDs. This vulnerability (CWE-306: Missing Authentication) is particularly serious because it affects industrial control systems that typically operate in critical infrastructure environments with high availability requirements. Organizations running vulnerable versions face direct risk of unauthorized device access without triggering conventional login alerts, potentially enabling lateral movement, configuration tampering, or operational disruption.

Casky's 283 mapped skills leverage Claude's extended reasoning to correlate this vulnerability with MITRE ATT&CK's Privilege Escalation (TA0004) and Credential Access (TA0006) techniques. When analyzing network traffic and device interactions, practitioners using Casky would identify attack indicators such as: repeated web interface requests probing for session ID patterns, timing-based correlation attacks exploiting predictable session generation, and successful authentication without credential submission. The platform's skill framework helps defenders recognize when attackers are performing session enumeration reconnaissance, distinguish legitimate session management from exploitation attempts, and prioritize patching 7SR5 devices as immediate remediation targets before active exploitation begins.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

283 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-62645.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

identity access management · low

Run

MITRE ATT&CK Techniques

TA0004 TA0006

Investigate the attack patterns behind CVE-2026-62645

Casky has 283 skills that investigate the attack patterns behind CVE-2026-62645. Run one and get CVSS-scored findings in 3 minutes.

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