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 /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

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MEDIUM

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

Published Sep 13, 2018

6.1

MEDIUM

CVSS 3.0

EPSS 1.44%

Description

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.

Affected products

Vendor F5 Networks, Inc. Product Big-IP Apm Default
n/a
- Version
  11.6.0-11.6.3
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

F5 Networks, Inc.

Big-IP Apm

n/a

Version	Status	Constraints
11.6.0-11.6.3	affected	-

Remediation

No remediation recorded yet.

Metrics

1.44% 0.01445

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01445

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (14 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.44% (0.01445)	72.33th	v5 (v2026.06.15)
Aug 23, 2026	1.86% (0.01863)	77.36th	v5 (v2026.06.15)
Jul 20, 2024	0.09% (0.00092)	39.76th	v3 (v2023.03.01)
Jun 27, 2024	0.09% (0.00092)	39.61th	v3 (v2023.03.01)
May 1, 2024	0.13% (0.00128)	46.98th	v3 (v2023.03.01)
Apr 7, 2024	0.15% (0.00150)	50.44th	v3 (v2023.03.01)
Feb 4, 2024	0.21% (0.00213)	59.33th	v3 (v2023.03.01)
Sep 7, 2023	0.31% (0.00313)	66.41th	v3 (v2023.03.01)
Sep 3, 2023	0.30% (0.00299)	65.59th	v3 (v2023.03.01)
Mar 7, 2023	0.31% (0.00309)	65.21th	v3 (v2023.03.01)
Mar 6, 2023	0.95% (0.00954)	36.37th	v2 (v2022.01.01)
Feb 4, 2022	0.95% (0.00954)	16.28th	v2 (v2022.01.01)
Feb 3, 2022	0.83% (0.00833)	24.58th	v5 (v2026.06.15)
Apr 14, 2021	0.83% (0.00833)	0.00th	v1

Weaknesses (1)

CWE-601

Open Redirect

References (3)

http://sbudella.altervista.org/blog/20180911-cve-2018-5548.html
x_refsource_MISCExploitTechnical DescriptionThird Party Advisory
http://www.securityfocus.com/bid/105353
vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
https://support.f5.com/csp/article/K66171422
x_refsource_CONFIRMVendor Advisory

Link	Providers	Tags
http://sbudella.altervista.org/blog/20180911-cve-2018-5548.html		x_refsource_MISCExploitTechnical DescriptionThird Party Advisory
http://www.securityfocus.com/bid/105353		vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
https://support.f5.com/csp/article/K66171422		x_refsource_CONFIRMVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner f5

Published Sep 13, 2018

Updated Sep 16, 2024

Reserved Jan 12, 2018

Link CVE-2018-5548

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2018-5548

Red Hat

Severity n/a

Public date n/a

Links CVE-2018-5548