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CVE-2021-33771Patch(microsoft / windows_10_1507)

LOWCVSS 7.8 · HIGHCISA KEV

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch microsoft windows_10_1507 systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Windows Kernel Elevation of Privilege Vulnerability

microsoft CVEsBack to dashboard
1.0/ 10 priority

Sources & remediation

Listed in the CISA Known Exploited Vulnerabilities catalog. Federal remediation due date: 2021-11-17. Apply updates per vendor instructions.

Patch / fix
Other references

Priority

LOW

Exploitation

ACTIVE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • windows_10_1507
  • windows_10_1607
  • windows_10_1809
  • windows_10_1909

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • 1 total mentions across 1 day

Affected systems

Vendors
microsoft
Products
windows_10_1507windows_10_1607windows_10_1809windows_10_1909windows_10_2004windows_10_20h2windows_10_21h1windows_8.1windows_rt_8.1windows_server_2004

1 version affected across 14 products

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-06-14: 1Patch / Workaround · 2026-06-14: 106-14
Signal classification1 categories
Patch
1100.0%
Full discourse1 post
  • Inviolable | Smart Global Tech@inviolableio
    Patch

    En julio de 2021, Microsoft lanzó parches para dos vulnerabilidades que Candiru explotaba (CVE-2021-31979 y CVE-2021-33771). No fue un comunicado de prensa: fueron actualizaciones de seguridad. Esa fue la forma elegida para revelar la investigación.

    Post summary

    Microsoft issued security patches in July 2021 for CVE-2021-31979 and CVE-2021-33771, vulnerabilities that had been exploited by the Candiru threat actor; the patch release served as the method to disclose the research.

    1000033
    22 followersView on X
CPE platform detail14 entries

14 of 14 entries

PartVendorProductVersionTarget SWTarget HW
OSmicrosoftwindows_10_1507---
OSmicrosoftwindows_10_1607---
OSmicrosoftwindows_10_1809---
OSmicrosoftwindows_10_1909---
OSmicrosoftwindows_10_2004---
OSmicrosoftwindows_10_20h2---
OSmicrosoftwindows_10_21h1---
OSmicrosoftwindows_8.1---
OSmicrosoftwindows_rt_8.1---
OSmicrosoftwindows_server_2004---
OSmicrosoftwindows_server_2012---
OSmicrosoftwindows_server_2016---
OSmicrosoftwindows_server_2019---
OSmicrosoftwindows_server_20h2---

Explore more

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