CVE-2018-5548: F5 Networks, Inc. BIG-IP APM vulnerability

CVE-2018-5548: On BIG-IP APM 11.6.0-11.6.3, an insecure AES ECB mode is used for orig_uri parameter in an undisclosed /vde...

On BIG-IP APM 11.6.0-11.6.3, an insecure AES ECB mode is used for orig_uri parameter in an undisclosed /vdesk link of APM virtual server configured with an access profile, allowing a malicious user to build a redirect URI value using different blocks of cipher texts.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 16, 2024, 19:41 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2018-5548 affects F5 BIG-IP APM 11.6.0 through 11.6.3. The issue involves weak encryption handling for a redirect-related orig_uri value, which may let a malicious user manipulate where an APM flow redirects a user. Exposure is limited to F5 BIG-IP APM versions 11.6.0 through 11.6.3 where an APM virtual server is configured with an access profile. Prioritize discovery first. Business urgency depends on whether affected BIG-IP APM versions are still deployed and exposed to users. No active exploitation is confirmed in the provided sources. Mitigation focus: Identify any BIG-IP APM systems running versions 11.6.0 through 11.6.3.; Confirm whether APM virtual servers have access profiles configured.; Review F5 advisory K66171422 for vendor-approved fixes or mitigations..

Prepared: Jun 7, 2026, 05:35 UTC (UTC+00:00)

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

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 13, 2018, 14:00 UTC (UTC+00:00)

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.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

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
https://support.f5.com/csp/article/K66171422CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

F5 Networks, Inc.BIG-IP APM11.6.0-11.6.3Listed

Weakness

CWE details

No CWE listed

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