What is CVE-2017-9841?

CVE-2017-9841 is a critical-severity vulnerability in Oracle Communications Diameter Signaling Router, classified under Code Injection. CVSS score: 9.8/10. Published 2017-06-27.

How severe is CVE-2017-9841?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2017-9841 known to be exploited?

Yes. CVE-2017-9841 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-02-15), indicating it is being actively exploited. 94 public proof-of-concept repositories are indexed.

RCE in Oracle Communications Diameter Signaling Router

CVE-2017-9841

Util/PHP/eval-stdin.php in PHPUnit before 4.8.28 and 5.x before 5.6.3 allows remote attackers to execute arbitrary PHP code via HTTP POST data beginning with a "<?php " substring, as demonstrated by an attack on a site with an exposed /vendor folder, i.e., external access to the /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php URI.

Vulnerability class: RCE (Remote Code Execution)

Published 2017-06-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 1.000 (100.0th percentile), scored 2026-10-15.

Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 1.000 · newest: 1.000 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-94 — Code Injection

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-02-15. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-08-15.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

www.securityfocus.com/bid/101798 (vdb-entry, Broken Link)
www.securitytracker.com/id/1039812 (vdb-entry, Broken Link)
security.gentoo.org/glsa/201711-15 (vendor-advisory, Third Party Advisory)
www.oracle.com/security-alerts/cpuoct2021.html (Patch, Third Party Advisory)
github.com/sebastianbergmann/phpunit/commit/284a69fb88a2d0845d23f42974a583d8f59… (Patch, Third Party Advisory)
github.com/sebastianbergmann/phpunit/pull/1956 (Patch, Third Party Advisory)
web.archive.org/web/20170701212357/http://phpunit.vulnbusters.com/ (Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2017-9841?: CVE-2017-9841 is a critical-severity vulnerability in Oracle Communications Diameter Signaling Router, classified under Code Injection. CVSS score: 9.8/10. Published 2017-06-27.
How severe is CVE-2017-9841?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2017-9841 known to be exploited?: Yes. CVE-2017-9841 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-02-15), indicating it is being actively exploited. 94 public proof-of-concept repositories are indexed.