Security readout for executives and security teams
Plain-English summary
This issue affects Cisco Small Business 100 and 300 Series wireless access points. A nearby attacker who can intercept the Wi-Fi handshake could push a client and access point from stronger AES-CCMP encryption to weaker WPA-TKIP. That downgrade does not itself disclose data, but it can enable later cryptographic attacks against wireless confidentiality.
Executive priority
Treat this as a targeted wireless confidentiality risk, not a broad remote takeover issue. Prioritize if affected access points protect sensitive offices, regulated data, or guest-to-corporate boundary networks. The absence of KEV evidence lowers emergency urgency, but unsupported or unverified firmware should be addressed.
Technical view
Cisco describes improper processing of certain EAPOL messages during the Wi-Fi handshake. In a man-in-the-middle position between supplicant and authenticator, an unauthenticated adjacent attacker could manipulate EAPOL exchange and force TKIP instead of AES-CCMP. The bundle does not provide CVSS details, fixed versions, or observed exploitation evidence.
Likely exposure
Exposure is limited to environments using Cisco Small Business 100 Series or 300 Series Wireless Access Points. The affected version range is unspecified in the provided sources, so teams should verify models, firmware, and Cisco advisory applicability directly.
Exploitation context
The attacker must be adjacent to the wireless network and able to establish a man-in-the-middle position during the Wi-Fi handshake. The sources do not indicate internet-scale exploitation, public exploit use, or CISA KEV listing.
Researcher notes
The key evidence is Cisco's EAPOL downgrade description and Bug ID CSCvj29229. The public bundle lacks CVSS metrics, precise vulnerable firmware ranges, and fixed-release details. Do not assume products outside the named Small Business 100 and 300 Series access points are affected.
Mitigation direction
- Review Cisco's advisory for affected firmware and vendor-supported remediation.
- Inventory Cisco Small Business 100 and 300 Series wireless access points.
- Upgrade or replace affected access points according to Cisco guidance.
- Where vendor-supported, require AES-CCMP and disable WPA-TKIP.
- Prioritize higher-risk offices handling sensitive wireless traffic.
Validation and detection
- Confirm deployed access point models and firmware versions against Cisco's advisory.
- Review wireless security settings for TKIP allowance or mixed cipher modes.
- Check whether clients negotiate TKIP where AES-CCMP is expected.
- Validate that firmware updates or configuration changes preserve normal client connectivity.
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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Open ATT&CK lookupCVE-2018-0412 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
- 20180815 Cisco Small Business 100 Series and 300 Series Wireless Access Points Encryption Algorithm Downgrade VulnerabilityCVE 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.
Cryptographic Issues
Cryptographic Issues represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.