Security readout for executives and security teams
Plain-English summary
This issue affects Cisco 800 Series Industrial Integrated Services Routers running Cisco IOS Software. A logged-in local attacker could use unintended internal test commands to overwrite memory on the device, potentially undermining device stability or control. Public sources provided do not state severity, fixed versions, or active exploitation.
Executive priority
Treat this as a targeted infrastructure risk, especially in industrial or remote-site environments. Urgency depends on whether affected routers exist and who has authenticated local access. Because severity and fixes are not included in the provided bundle, prioritize vendor-guided verification before emergency action.
Technical view
The vulnerability is in the embedded test subsystem of Cisco IOS Software on Cisco 800 Series Industrial ISRs. Internal development test commands were present in affected software, enabling an authenticated local attacker to write arbitrary values to arbitrary memory locations. The mapped weakness is CWE-123.
Likely exposure
Exposure is limited to organizations operating Cisco 800 Series Industrial Integrated Services Routers with affected Cisco IOS Software and where an attacker can obtain local authenticated access to the device CLI or equivalent management context.
Exploitation context
The supplied sources describe authenticated local exploitation through unintended test commands. They do not cite remote unauthenticated exploitation, public exploit availability, KEV listing, or observed active exploitation.
Researcher notes
Key missing evidence includes CVSS score, affected IOS release ranges, fixed versions, and exploit telemetry. The vulnerability requires authenticated local access according to the provided description. Avoid assuming broader Cisco IOS exposure beyond Cisco 800 Series Industrial Integrated Services Routers unless confirmed by Cisco.
Mitigation direction
- Inventory Cisco 800 Series Industrial ISR devices and IOS versions.
- Review Cisco’s advisory for affected releases and fixed software guidance.
- Limit local administrative access to trusted operators only.
- Harden device management access and enforce strong account controls.
- Monitor Cisco guidance for any updated remediation details.
Validation and detection
- Confirm whether Cisco 800 Series Industrial ISRs exist in the environment.
- Compare installed IOS versions against Cisco’s advisory guidance.
- Review who has local authenticated access to affected devices.
- Check operational logs for unusual administrative activity where available.
- Document remediation status for each potentially affected router.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-123: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2018-15375 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- 20180926 Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers Arbitrary Memory Write VulnerabilitiesCVE reference · vendor-advisory, x_refsource_CISCO
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.
Write-what-where Condition
Write-what-where Condition represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.