CVE-2017-1000486Known exploitationPublic exploitNetwork attack vectorHinoki check available

Unauthenticated code execution via forged encrypted expressions

Published Jan 3, 2018 · Updated Oct 21, 2025

EL injection in PrimeTek Informatics PrimeFaces 5.x allows remote attackers to execute code through crafted dynamic-resource requests. StreamedContentHandler decrypts the attacker-controlled pfdrid parameter and evaluates its plaintext as an expression; the default encryption secret permits forged expressions, and a padding oracle supports attacks against changed secrets. An exposed dynamic-resource endpoint requires no login, and injected expressions execute with the hosting application's privileges.

CVSS severity9.8
Critical
EPSS probability94.10%
Next 30 days · Nov 1, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

EL injection in PrimeTek Informatics PrimeFaces 5.x allows remote attackers to execute code through crafted dynamic-resource requests. StreamedContentHandler decrypts the attacker-controlled pfdrid parameter and evaluates its plaintext as an expression; the default encryption secret permits forged expressions, and a padding oracle supports attacks against changed secrets. An exposed dynamic-resource endpoint requires no login, and injected expressions execute with the hosting application's privileges.

The record

CVE
CVE-2017-1000486
Published
Jan 3, 2018
Updated
Oct 21, 2025
Vendor
PrimeTek Informatics
Product
PrimeFaces
Classifications
CWE-326, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 2018CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PrimeTek Informatics · PrimeFacesversion=n/a

Published CVSS scores

9.8GitHub Advisory DatabaseCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsShadowserver observations through Sep 28, 2026. Gaps indicate unavailable data.
Sep 22, 2026Sep 28, 2026
View daily counts
Reporting dayUnique IPs
Sep 22, 202611
Sep 23, 20268
Sep 24, 202618
Sep 25, 202620
Sep 26, 20266
Sep 27, 202614
Sep 28, 202613
Latest reporting daySep 28, 2026
Latest daily unique IPs13
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-326Inadequate Encryption Strength
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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