Security readout for executives and security teams
Plain-English summary
This issue can let an unauthenticated remote attacker crash certain Allen-Bradley MicroLogix 1100 and 1400 controllers through a crafted HTTP request. The business risk is process disruption, not data theft. Exposure depends on whether affected controller web interfaces are reachable over plant, corporate, or external networks.
Executive priority
Treat as high priority where these controllers support production or safety-adjacent operations. The likely impact is outage or process disruption. Prioritize internet-reachable or broadly reachable devices first, then schedule firmware and segmentation work through normal operational-change controls.
Technical view
CVE-2015-6492 is a CWE-119 memory corruption flaw affecting MicroLogix 1100 before B FRN 15.000 and MicroLogix 1400 before B FRN 15.003. CVSS 3.1 is 7.5: network attack vector, low complexity, no privileges, no user interaction, availability impact only.
Likely exposure
Most relevant to industrial environments using Allen-Bradley MicroLogix 1100 or 1400 controllers with HTTP enabled and reachable. Internet exposure would materially increase urgency. The source bundle’s structured affected-product fields are incomplete, so confirm against CISA/Rockwell guidance.
Exploitation context
The public description states remote attackers can cause denial of service through a crafted HTTP request. The source bundle does not show CISA KEV listing or active exploitation evidence. Do not assume exploitation is occurring without additional telemetry or authoritative reporting.
Researcher notes
The vulnerability is availability-only per CVSS, but in ICS environments controller crashes can have operational consequences. The bundle provides a CISA advisory reference but no exploit confirmation. Affected metadata is sparse, so validation should rely on model, firmware FRN, and network reachability.
Mitigation direction
- Inventory MicroLogix 1100 and 1400 controllers and record firmware FRN versions.
- Prioritize devices below B FRN 15.000 or B FRN 15.003 respectively.
- Check CISA/Rockwell advisory guidance before firmware changes.
- Restrict controller HTTP access to trusted engineering networks only.
- Avoid exposing controller web interfaces to the internet or enterprise users.
- Use segmentation and access controls to reduce unauthenticated network reachability.
Validation and detection
- Confirm device model and firmware FRN from asset records or approved management interfaces.
- Compare versions to the affected thresholds in the CVE description.
- Review firewall rules for paths to controller HTTP services.
- Check external exposure management for public controller web access.
- Review availability incidents involving unexplained controller crashes.
- Document remediation status and compensating controls per site.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-119: Exact CWE lookup
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Open ATT&CK lookupCVE-2015-6492 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://ics-cert.us-cert.gov/advisories/ICSA-15-300-03CVE reference, icscert · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.