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CVE-2019-9670

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 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
9.0/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 99.99%: +0.50

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 10 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Dark Reading
Press · 25 Jan 2024, 08:00 · 'Midnight Blizzard' Breached HPE Email Months Before Microsoft Hack - Dark Reading
GBHackers News
Press · 20 Sep 2023, 07:00 · Hackers Deployed never-before-seen Linux Malware Attacking Government Entities - GBHackers News
GreyNoise
Press · 28 Jan 2022, 08:00 · Malicious Tag Roundup (January 2022) | Cybersecurity Blog - GreyNoise
BleepingComputer
Press · 11 Jan 2022, 08:00 · CISA alerts federal agencies of ancient bugs still being exploited - BleepingComputer
The Hacker News
Press · 08 May 2021, 07:00 · Top 12 Security Flaws Russian Spy Hackers Are Exploiting in the Wild - The Hacker News
See all 10 source documents
Security Affairs
Press · 16 Apr 2021, 07:00 · Russia-linked APT SVR actively targets these 5 flaws - Security Affairs
Cisco Talos Blog
Press · 15 Apr 2021, 07:00 · Threat Advisory: NSA SVR Advisory Coverage - Cisco Talos Blog
National Security Agency (NSA) (.gov)
Press · 15 Apr 2021, 07:00 · Russian Foreign Intelligence Service Exploiting Five Publicly Known Vulnerabilities to Com - National Security Agency (NSA) (.gov)
The Record from Recorded Future News
Press · 15 Apr 2021, 07:00 · CISA, FBI, NSA reveal five enterprise bugs exploited by Russia's APT29 group - The Record from Recorded Future News
cyfirma
Press · 28 Dec 2020, 08:00 · Incidents, attributions, and exploitation techniques for path traversal flaw in Fortinet FortiOS SSL VPN devices - cyfirma

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 9.0 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

1

Public exploit entries / repo candidates

See 1 repos with metrics
RepositoryStarsForksLanguageUpdated
rek7/Zimbra-RCE2613Python16 Aug 2019, 05:54
Public exploit evidence
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 100.0%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:11.176807+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
29 May 2019, 21:04
First press mention
28 Dec 2020, 08:00
Added to the CISA KEV catalog
10 Jan 2022, 00:00
Latest press mention
25 Jan 2024, 08:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
1 repositories