CVE-2021-26411
Microsoft Internet Explorer Memory Corruption Vulnerability
CVSS
8.8
Alta
EPSS
81.7%
p100
KEV
SIM
3 de nov. de 2021
Exploit Today
80
0-100
Publicado: 11 de mar. de 2021 · Última mod.: 1 de out. de 2026 · CWE-416
80.8%EPSS · 30 dias81.7%
2026-10-082026-11-05
Produto
Microsoft / Internet Explorer
Vulnerabilidade
Microsoft Internet Explorer Memory Corruption Vulnerability
Adicionado ao KEV
3 de nov. de 2021
Corrigir até
17 de nov. de 2021
Uso conhecido em ransomware
Sim
Descrição resumida
Microsoft Internet Explorer contains an unspecified vulnerability that allows for memory corruption.
Ação necessária
Apply updates per vendor instructions.
Notas
https://nvd.nist.gov/vuln/detail/CVE-2021-26411
Internet Explorer Memory Corruption Vulnerability
CVECVSSEPSSKEVRExploitTítuloMod.
CVE-2026-69044—3.4%
——1In the Samsung GPU driver, improper reference count handling during command submission can lead to memory corruption.23hCVE-2026-69043—3.4%
——1In the Samsung Exynos GPU driver, improper synchronization during buffer object creation and closing can lead to memory corruption23hCVE-2026-824189.8 CRÍ38.6%
——12IBM Watson Speech Services Cartridge 4.0.0 through 5.4.0 could allow a remote attacker to execute arbitrary code due to a use-after-free vulnerability.1dCVE-2026-1219635.9 MÉD23.8%
——7FreeRDP before 3.32.2 contains a use-after-free vulnerability in the asynchronous dynamic rdpsnd channel that allows malicious RDP servers to trigger freed callback access by closing the channel with queued audio PDUs. Attackers can send a training PDU then close the channel so the playback thread reads the freed callback in rdpsnd_virtual_channel_write, crashing the client.7hCVE-2026-1219557.5 ALT36.2%
——11FreeRDP before 3.32.2 contains a use-after-free vulnerability in Emulate_SCardReleaseContext that frees the emulated SCardContext before its worker thread is cancelled and joined. A malicious server can send ESTABLISHCONTEXT, a long-timeout GETSTATUSCHANGE, then RELEASECONTEXT smartcard IRPs to corrupt heap memory or crash clients using smartcard emulation.6hCVE-2026-1219539.8 CRÍ46.5%
——14FreeRDP before 3.32.2 has a use-after-free in the client's rdpgfx dynamic virtual channel: a duplicate-name channel with a new ChannelId overwrites the listener's single callback slot, which rdpgfx_on_close frees without clearing. A malicious RDP server can open and close such a channel, then send a PDU on the original channel to crash the client or potentially execute code.6h