CVE-2016-2203

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
7.8EG
EchelonGraph verdictMitigate this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Metasploit, public exploit)
CISA-KEV: Not listedEPSS PROB: 7.1%CVSS: 7.8Exploit: Metasploit · public exploitExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

The management console on Symantec Messaging Gateway (SMG) Appliance devices before 10.6.1 allows local users to discover an encrypted AD password by leveraging certain read privileges.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
66
EG Risk 66/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation65% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
7.1%
EPSS %ILE
94th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 22, 2016

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Sep 30, 2026
🔬 Proof of concept available. No fix on record yet.
generic🟡 PoC Available

Symantec Brightmail 10.6.0-7 - LDAP Credentials Disclosure (Metasploit) - Java webapps Exploit

https://www.exploit-db.com/exploits/39715/
generic

Security Updates Detail

http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=&suid=20160418_00
generic

CVE-2016-2203 - PSIRT.COM

http://www.securityfocus.com/bid/86137
generic

Packet Storm - Human Validation

http://packetstormsecurity.com/files/136758/Symantec-Brightmail-10.6.0-7-LDAP-Credential-Grabber.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 19× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 139 total refreshes for this CVE.

  1. 2026-10-05 17:38 UTCEPSS rescore
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  25. 2026-07-23 01:22 UTCEG score recompute
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  27. 2026-07-22 14:04 UTCEPSS rescore
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  75. 2026-06-15 17:45 UTCEPSS rescore

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Metasploit module) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitauxiliary/scanner/http/symantec_brightmail_ldapcreds✓ verified
    First seen Dec 17, 2015

    Symantec Messaging Gateway 10 Exposure of Stored AD Password Vulnerability

    Open source ↗
  • Exploit-DBEDB-39715
    First seen Apr 21, 2016

    Symantec Brightmail 10.6.0-7 - LDAP Credentials Disclosure (Metasploit)

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2016-2203?
CVE-2016-2203 is a high vulnerability published on April 22, 2016. The management console on Symantec Messaging Gateway (SMG) Appliance devices before 10.6.1 allows local users to discover an encrypted AD password by leveraging certain read privileges.
When was CVE-2016-2203 disclosed?
CVE-2016-2203 was first published on April 22, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-2203 actively exploited?
CVE-2016-2203 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model classifies it as weaponized: a functional public exploit exists. FIRST EPSS estimates a 7.1% probability of exploitation in the next 30 days (94th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-2203?
CVE-2016-2203 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2016-2203?
No fix for CVE-2016-2203 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

Dependency Blast Radius

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