Threats / Microsoft / CVE-2019-0676
CVE-2019-0676
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
Microsoft Internet Explorer vulnerability
Internet Explorer information disclosure vulnerability allowing attackers to test for file presence on disk through improper memory object handling.
Verdict
Today item — known-exploited.
An information disclosure flaw in Internet Explorer permits attackers to enumerate files on a victim's system by exploiting memory object handling. The vulnerability has been observed in active exploitation.
CISA KEV Yes · 2022-05-234EPSS 0.07505 (verify live)5CVSS 6.5 (CISA)3CISA SSVC Exploitation: active · Automatable: no · Impact: partial3
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
3 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 2022-05-23).
Probability (EPSS)
EPSS 0.07505 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N) · Affected: Microsoft, Internet Explorer. Confirm exact fixed builds in the vendor advisory.CVSS — CISA-assigned via the ADP container (CVE.org), version 3.1; the CNA left no metrics, so CISA's own score is used ahead of NVD.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: no · Technical Impact: partialCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 1174 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
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 craft a malicious webpage that triggers improper memory object handling in Internet Explorer.
Business
User browsing habits expose system file structure to reconnaissance attacks.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I probe for the existence of specific files on the target system by observing behavioral differences in the browser's response.
Business
Attackers gain intelligence about installed software, user profiles, and system configuration without user awareness.
3
Lateral reach — past segmentation narrative 3
Attacker
I use discovered file paths and system information to refine subsequent attacks or social engineering campaigns.
Business
Information disclosure becomes a stepping stone for targeted compromise, increasing breach risk and attack surface.
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