CVE-2019-9670

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-01-10), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Exploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 100%CVSS: 9.8Exploit: cisa kev · ssvc active · Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed: 0

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

mailboxd component in Synacor Zimbra Collaboration Suite 8.7.x before 8.7.11p10 has an XML External Entity injection (XXE) vulnerability, as demonstrated by Autodiscover/Autodiscover.xml.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
100%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

May 29, 2019

Last Modified

November 4, 2025

Advisory Details (6)

Auto-updated Sep 17, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

CVE-2019-9670: Zimbra Collaboration Suite XXE vulnerability

https://isc.sans.edu/forums/diary/CVE20199670+Zimbra+Collaboration+Suite+XXE+vulnerability/27570/
generic

109129 – XXE [CWE-611]

https://bugzilla.zimbra.com/show_bug.cgi?id=109129
generic

Zimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRF | Metasploit Module

http://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rce
generic

Packet Storm Security

http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html
generic🟡 PoC Available

Zimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit) - Linux remote Exploit

https://www.exploit-db.com/exploits/46693/
generic

Zimbra Security Advisories - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 48× in last 7d / 204× 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 747 total refreshes for this CVE.

  1. 2026-09-19 21:36 UTCGHSA enrichment
  2. 2026-09-19 17:45 UTCGHSA enrichment
  3. 2026-09-19 13:53 UTCGHSA enrichment
  4. 2026-09-19 09:58 UTCGHSA enrichment
  5. 2026-09-19 06:07 UTCGHSA enrichment
  6. 2026-09-19 02:16 UTCGHSA enrichment
  7. 2026-09-18 22:25 UTCGHSA enrichment
  8. 2026-09-18 19:20 UTCCISA KEV update
  9. 2026-09-18 18:35 UTCGHSA enrichment
  10. 2026-09-18 14:44 UTCGHSA enrichment
  11. 2026-09-18 14:15 UTCCISA KEV update
  12. 2026-09-18 10:53 UTCGHSA enrichment
  13. 2026-09-18 07:02 UTCGHSA enrichment
  14. 2026-09-18 03:11 UTCGHSA enrichment
  15. 2026-09-17 23:20 UTCGHSA enrichment
  16. 2026-09-17 19:29 UTCGHSA enrichment
  17. 2026-09-17 15:38 UTCGHSA enrichment
  18. 2026-09-17 11:47 UTCGHSA enrichment
  19. 2026-09-17 07:56 UTCGHSA enrichment
  20. 2026-09-17 04:05 UTCGHSA enrichment
  21. 2026-09-17 00:14 UTCGHSA enrichment
  22. 2026-09-16 20:22 UTCGHSA enrichment
  23. 2026-09-16 16:30 UTCGHSA enrichment
  24. 2026-09-16 14:10 UTCCISA KEV update
  25. 2026-09-16 12:36 UTCGHSA enrichment
Show 75 more
  1. 2026-09-16 08:45 UTCGHSA enrichment
  2. 2026-09-16 04:54 UTCGHSA enrichment
  3. 2026-09-16 01:03 UTCGHSA enrichment
  4. 2026-09-15 21:12 UTCGHSA enrichment
  5. 2026-09-15 17:21 UTCGHSA enrichment
  6. 2026-09-15 13:30 UTCGHSA enrichment
  7. 2026-09-15 09:39 UTCGHSA enrichment
  8. 2026-09-15 05:48 UTCGHSA enrichment
  9. 2026-09-15 01:56 UTCGHSA enrichment
  10. 2026-09-14 22:04 UTCGHSA enrichment
  11. 2026-09-14 19:24 UTCCISA KEV update
  12. 2026-09-14 18:09 UTCGHSA enrichment
  13. 2026-09-14 14:18 UTCGHSA enrichment
  14. 2026-09-14 10:27 UTCGHSA enrichment
  15. 2026-09-14 06:37 UTCGHSA enrichment
  16. 2026-09-14 02:46 UTCGHSA enrichment
  17. 2026-09-13 22:55 UTCGHSA enrichment
  18. 2026-09-13 19:04 UTCGHSA enrichment
  19. 2026-09-13 15:13 UTCGHSA enrichment
  20. 2026-09-13 11:22 UTCGHSA enrichment
  21. 2026-09-13 07:31 UTCGHSA enrichment
  22. 2026-09-13 03:40 UTCGHSA enrichment
  23. 2026-09-12 23:49 UTCGHSA enrichment
  24. 2026-09-12 19:58 UTCGHSA enrichment
  25. 2026-09-12 16:07 UTCGHSA enrichment
  26. 2026-09-12 12:16 UTCGHSA enrichment
  27. 2026-09-12 08:25 UTCGHSA enrichment
  28. 2026-09-12 04:34 UTCGHSA enrichment
  29. 2026-09-12 00:42 UTCGHSA enrichment
  30. 2026-09-11 20:51 UTCGHSA enrichment
  31. 2026-09-11 18:49 UTCCISA KEV update
  32. 2026-09-11 17:00 UTCGHSA enrichment
  33. 2026-09-11 13:08 UTCGHSA enrichment
  34. 2026-09-11 09:17 UTCGHSA enrichment
  35. 2026-09-11 05:26 UTCGHSA enrichment
  36. 2026-09-11 01:34 UTCGHSA enrichment
  37. 2026-09-10 21:43 UTCGHSA enrichment
  38. 2026-09-10 19:28 UTCCISA KEV update
  39. 2026-09-10 17:52 UTCGHSA enrichment
  40. 2026-09-10 14:01 UTCGHSA enrichment
  41. 2026-09-10 10:10 UTCGHSA enrichment
  42. 2026-09-10 06:19 UTCGHSA enrichment
  43. 2026-09-10 02:28 UTCGHSA enrichment
  44. 2026-09-09 22:37 UTCGHSA enrichment
  45. 2026-09-09 19:08 UTCCISA KEV update
  46. 2026-09-09 18:45 UTCGHSA enrichment
  47. 2026-09-09 14:54 UTCGHSA enrichment
  48. 2026-09-09 11:01 UTCGHSA enrichment
  49. 2026-09-09 07:10 UTCGHSA enrichment
  50. 2026-09-09 03:19 UTCGHSA enrichment
  51. 2026-09-08 23:28 UTCGHSA enrichment
  52. 2026-09-08 19:37 UTCGHSA enrichment
  53. 2026-09-08 18:54 UTCCISA KEV update
  54. 2026-09-08 15:46 UTCGHSA enrichment
  55. 2026-09-08 11:51 UTCGHSA enrichment
  56. 2026-09-08 07:57 UTCGHSA enrichment
  57. 2026-09-08 04:06 UTCGHSA enrichment
  58. 2026-09-08 00:15 UTCGHSA enrichment
  59. 2026-09-07 20:22 UTCGHSA enrichment
  60. 2026-09-07 16:31 UTCGHSA enrichment
  61. 2026-09-07 12:40 UTCGHSA enrichment
  62. 2026-09-07 08:46 UTCGHSA enrichment
  63. 2026-09-07 04:55 UTCGHSA enrichment
  64. 2026-09-07 01:05 UTCGHSA enrichment
  65. 2026-09-06 21:12 UTCGHSA enrichment
  66. 2026-09-06 17:21 UTCGHSA enrichment
  67. 2026-09-06 13:30 UTCGHSA enrichment
  68. 2026-09-06 09:39 UTCGHSA enrichment
  69. 2026-09-06 05:48 UTCGHSA enrichment
  70. 2026-09-06 01:57 UTCGHSA enrichment
  71. 2026-09-05 22:05 UTCGHSA enrichment
  72. 2026-09-05 18:14 UTCGHSA enrichment
  73. 2026-09-05 14:23 UTCGHSA enrichment
  74. 2026-09-05 10:30 UTCGHSA enrichment
  75. 2026-09-05 06:39 UTCGHSA enrichment

Publicly available exploits

(4 references)

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

  • GitHub PoCrek7/Zimbra-RCE
    First seen Aug 16, 2019

    Zimbra RCE PoC - CVE-2019-9670 XXE/SSRF

    Open source ↗
  • Exploit-DBEDB-46693✓ verified
    First seen Apr 12, 2019

    Zimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit)

    Open source ↗
  • Metasploitexploit/linux/http/zimbra_xxe_rce✓ verified
    First seen Mar 13, 2019

    Zimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRF

    Open source ↗
  • Nucleihttp/cves/2019/CVE-2019-9670.yaml
    First seen Jan 1, 2019

    Synacor Zimbra Collaboration <8.7.11p10 - XML External Entity Injection

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2019-9670?
CVE-2019-9670 is a critical vulnerability published on May 29, 2019. mailboxd component in Synacor Zimbra Collaboration Suite 8.7.x before 8.7.11p10 has an XML External Entity injection (XXE) vulnerability, as demonstrated by Autodiscover/Autodiscover.xml.
When was CVE-2019-9670 disclosed?
CVE-2019-9670 was first published in the National Vulnerability Database on May 29, 2019, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-9670 actively exploited?
Yes. CISA added CVE-2019-9670 to the Known Exploited Vulnerabilities catalog on January 10, 2022, affecting Synacor Zimbra Collaboration Suite (ZCS). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2019-9670?
CVE-2019-9670 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2019-9670?
CVE-2019-9670 affects Synacor Zimbra Collaboration Suite (ZCS). The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2019-9670?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-9670, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2019-9670

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