Threats / Microsoft / CVE-2022-21999
CVE-2022-21999
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft Windows vulnerability
Microsoft Windows Print Spooler vulnerability allows privilege escalation. Actively exploited in ransomware campaigns.
Verdict
Today item, not a backlog item.
An unspecified privilege escalation flaw in Windows Print Spooler enables attackers to gain elevated system access. Active exploitation in ransomware operations and wild deployment indicate high operational risk.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
6 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25), flagged for known ransomware use.
Probability (EPSS)
EPSS 0.41683 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Microsoft, Windows. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-40 CWE-40, CWE-1386 CWE-1386 — weakness family: Path traversal / file.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I gain initial access to a Windows system through phishing, weak credentials, or network exposure.
Business
Attacker establishes foothold in corporate environment, bypassing perimeter controls.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I exploit the Print Spooler vulnerability to escalate my privileges from user to system level.
Business
Attacker obtains administrative rights, enabling lateral movement and persistence across the network.
3
Lateral reach — past segmentation narrative 3
Attacker
I deploy ransomware or data exfiltration tools with system-level permissions.
Business
Organization faces operational shutdown, data loss, and financial extortion demands from ransomware operators.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05