Prioritizing “critical” vulnerabilities: A threat intelligence perspective
There was an extensive amount of open source coverage of this vulnerability, which referenced risk scoring previously assigned to the BlueKeep vulnerability CVE-2019-0708.
CVE-2019-0708 KEVRansomwarePublic exploit Critical · 9.8 EPSS >99.9%
Microsoft Remote Desktop Services Remote Code Execution Vulnerability
Microsoft · Remote Desktop Services
Summary
A use-after-free flaw in Microsoft Remote Desktop Services (formerly Terminal Services) allows remote code execution. An unauthenticated attacker with network access to the target can connect using RDP and send specially crafted requests, requiring no user interaction.
Official description · NVD
A remote code execution vulnerability exists in Remote Desktop Services formerly known as Terminal Services when an unauthenticated attacker connects to the target system using RDP and sends specially crafted requests, aka 'Remote Desktop Services Remote Code Execution Vulnerability'.
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown. Breakdown
86.0 / 100
- Exploited
- Yes, in CISA KEV
- Reports
- 2
- Tactics
- 3/15
How an attack unfolds
Based on MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. mappings. Select a step to see the evidence.How attackers get in
What can follow
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited 3 months after disclosure. Public exploit code (PoC-in-GitHub) was available 2 days before disclosure.
- Public exploit codePoC-in-GitHub2 days before
- Disclosedday 0
- First seen exploitedVulnCheck KEV evidence+3 mo
- Named in a threat reportIntel 471+15 mo
- Added to CISA KEVknown ransomware use; EU database agrees+2 yrs
CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
2 TechniqueOne specific attacker behaviour in MITRE ATT&CK, such as T1190 “Exploit Public-Facing Application”. IDs with a dot, like T1059.004, are sub-techniques., grouped by TacticThe attacker’s goal at a stage of an attack in MITRE ATT&CK, such as Initial Access or Persistence. Each technique belongs to one or more tactics. in kill-chain order 2Initial AccessTA0001
External Remote Services T1133 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details. also Persistence
MITRE CTID mapping of the KEV entry · how it is exploited
CVE-2019-0708, also known as BlueKeep, is a remote code execution vulnerability present in the Windows Remote Desktop Services. Blue Keep can enable remote unauthenticated attackers to run arbitrary code, or conduct denial of service attacks, as well as potentially take control of vulnerable systems.
ImpactTA0040
Network Denial of Service T1498 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details.
MITRE CTID mapping of the KEV entry · follow-on activity
Lower-confidence links (3)
These come from early or generic mappings, text matching, or contradict this CVE’s details (for example a public-facing technique on a bug that needs a user to open a file). Shown for completeness.
- Unix ShellT1059.004 technique is for ESXi, Linux, Network Devices, macOS; product runs on Windows
- Exploitation for Privilege EscalationT1068 CTID attack_to_cve Phase 1 "Uncategorized" mapping (not staged by impact)
- Hijack Execution FlowT1574 CTID attack_to_cve Phase 1 "Uncategorized" mapping (not staged by impact)
Detection
2 rules for this CVE · 23 general rules for its techniquesRules for this CVE
2Sigma ruleAn open, vendor-neutral detection rule for log data. Security teams convert Sigma rules into searches for their own SIEM. that reference CVE-2019-0708 directly.General rules for this CVE’s techniques
These detect the technique in general, not this specific vulnerability.
External Remote ServicesT113320 general rules
- External Remote SMB Logon from Public IPhightest
- OpenCanary - SSH Login Attempthightest
- OpenCanary - SSH New Connection Attempthightest
- OpenCanary - Telnet Login Attempthightest
- Running Chrome VPN Extensions via the Registry 2 VPN Extensionhightest
- Unusual Child Process of dns.exehightest
- Unusual File Deletion by Dns.exehightest
- Unusual File Modification by dns.exehightest
Network Denial of ServiceT14983 general rules
Sigma rules © SigmaHQ, Detection Rule License 1.1; linked, not reproduced.
What security researchers reported
Named in 2 threat reports2 reportsIntel 471web-assets.esetstatic.comAug 2020 · 1 undated
Reports are matched by finding the exact id CVE-2019-0708 in their text; nobody has reviewed the match. One passage is shown per report, at most 320 characters, linked to the original.
ESET InvisiMole
We have observed InvisiMole using the BlueKeep and EternalBlue vulnerabilities (CVE-2019-0708 and…
Also mentioned in 50 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
- Actively_Exploited_Kev | Oct 29, 202628 Oct 2026
- Actively_Exploited_Kev | Oct 28, 202627 Oct 2026
- Actively_Exploited_Kev | Oct 27, 202626 Oct 2026
- Actively_Exploited_Kev | Oct 24, 202623 Oct 2026
- Actively_Exploited_Kev | Oct 23, 202622 Oct 2026
- Actively_Exploited_Kev | Oct 22, 202621 Oct 2026
- 44 more on OTX