Security readout for executives and security teams
This issue affects Cisco IOS and IOS XE devices using IKEv1 with RSA-encrypted nonces. A remote unauthenticated attacker may be able to make the device reveal encrypted nonce material from an IKEv1 session. The source bundle does not show public active exploitation or a severity score. Exposure is limited to Cisco IOS or IOS XE systems configured for IKEv1 using RSA-encrypted nonces. Devices not using that IKEv1 mode are not shown as exposed by the provided sources. Product versions are unspecified in the bundle, so asset-level confirmation requires Cisco advisory and device configuration review. Treat as a targeted network infrastructure risk. It is not confirmed as actively exploited in the provided sources, but unauthenticated remote reachability and VPN exposure justify timely inventory and remediation planning for affected Cisco deployments. Mitigation focus: Review Cisco advisory cisco-sa-20180813-rsa-nonce for affected releases and vendor fixes.; Inventory Cisco IOS and IOS XE devices using IKEv1 RSA-encrypted nonces.; Prioritize vendor-supported software updates for confirmed affected devices..
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
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ATT&CK lookup starting points
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CWE-326: Exact CWE lookup
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Open ATT&CK lookupCVE-2018-0131 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
- 20180813 Cisco IOS and IOS XE Software Internet Key Exchange Version 1 RSA-Encrypted Nonces 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.
Inadequate Encryption Strength
Inadequate Encryption Strength represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.