LiveActive security incident?Get immediate response
CVE Record

CVE-2020-3475: Cisco IOS XE Software Web Management Framework Vulnerabilities

Multiple vulnerabilities in the web management framework of Cisco IOS XE Software could allow an authenticated, remote attacker with read-only privileges to gain unauthorized read access to sensitive data or cause the web management software to hang or crash, resulting in a denial of service (DoS) condition. For more information about these vulnerabilities, see the Details section of this advisory.

MediumCVSS 4.3Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2020-3475 affects the Cisco IOS XE web management framework. A low-privileged authenticated remote user could read sensitive data without authorization. The provided description also mentions possible web management hangs or crashes, but the listed CVSS vector for this CVE reflects confidentiality impact only.

Executive priority

Treat this as a targeted network-device hygiene issue, not a confirmed emergency. Prioritize if IOS XE web management is exposed to many administrators, third parties, or less-trusted networks.

Technical view

The supplied record maps CVE-2020-3475 to CWE-20 in Cisco IOS XE Software 16.1.1. CVSS 3.1 is 4.3: network reachable, low complexity, privileges required, no user interaction, unchanged scope, low confidentiality impact, no integrity or availability impact.

Likely exposure

Exposure is most likely where Cisco IOS XE Software 16.1.1 uses the web management framework and authenticated read-only users can reach that interface. The supplied bundle does not identify additional affected releases or deployment prerequisites.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The attack requires authenticated read-only access, which lowers broad internet risk but matters where shared, delegated, or compromised admin accounts exist.

Researcher notes

Evidence is limited to the CVE record and Cisco advisory reference. The supplied data lists Cisco IOS XE Software 16.1.1 and CWE-20, but does not include detailed vulnerable endpoints, fixed versions, workaround text, or exploit telemetry.

Mitigation direction

  • Review Cisco's advisory for affected-release and fixed-release guidance.
  • Inventory Cisco IOS XE 16.1.1 devices with web management enabled.
  • Apply Cisco's recommended update or workaround where applicable.
  • Limit web management access to trusted administrative paths where possible.
  • Review read-only administrative account exposure and necessity.

Validation and detection

  • Confirm installed Cisco IOS XE versions on managed devices.
  • Check whether the web management framework is enabled and reachable.
  • Compare device versions against Cisco's advisory.
  • Review management logs for unexpected read-only access patterns.
  • Track whether Cisco guidance has been fully applied.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · low confidence lookup

CWE-20: 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 lookup
cve · low confidence lookup

CVE-2020-3475 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
4.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N2.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.3Medium
CVSS 3.1 vector shape for CVE-2020-3475Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
CiscoCisco IOS XE Software 16.1.1n/aListed
Weakness

CWE details

CWE-20

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.