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hlukh.ch Updated: 2026-02-25T12:01:17.018Z · week: 2021-W23

Security Warnings

Curated from public advisories. Focus: visibility, context and fast export — no clickbait.

Latest warnings
CVE-2021-31944
3D Viewer Information Disclosure Vulnerability
2026‑02‑21 · CVE-2021-31944
MSRC 2026‑02‑21 Medium
CVE-2021-31942
3D Viewer Remote Code Execution Vulnerability
2026‑02‑21 · CVE-2021-31942
MSRC 2026‑02‑21 High
CVE-2021-31943
3D Viewer Remote Code Execution Vulnerability
2026‑02‑21 · CVE-2021-31943
MSRC 2026‑02‑21 High
CVE-2020-27661
A divide-by-zero issue was found in dwc2_handle_packet in hw/usb/hcd-dwc2.c in the hcd-dwc2 USB host controller emulation of QEMU. A malicious guest could use this flaw to crash the QEMU process on the host resulting in a denial of service.
2026‑02‑21 · CVE-2020-27661
MSRC 2026‑02‑21 Medium
CVE-2021-3564
A flaw double-free memory corruption in the Linux kernel HCI device initialization subsystem was found in the way user attach malicious HCI TTY Bluetooth device. A local user could use this flaw to crash the system. This flaw affects all the Linux kernel versions starting from 3.13.
2026‑02‑21 · CVE-2021-3564
MSRC 2026‑02‑21 Medium
CVE-2021-3468
A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service which becomes unresponsive after this flaw is triggered.
2026‑02‑21 · CVE-2021-3468
MSRC 2026‑02‑21 Medium
CVE-2021-32027
A flaw was found in postgresql in versions before 13.3 before 12.7 before 11.12 before 10.17 and before 9.6.22. While modifying certain SQL array values missing bounds checks let authenticated database users write arbitrary bytes to a wide area of server memory. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
2026‑02‑21 · CVE-2021-32027
MSRC 2026‑02‑21 High
CVE-2020-27748
A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs, xdg-email allows attachments to be discreetly added via the URI when being passed to Thunderbird. An attacker could potentially send a victim a URI that automatically attaches a sensitive file to a new email. If a victim user does not notice that an attachment was added and sends the email, this could result in sensitive information disclosure. It has been confirmed that the code behind this issue is in xdg-email and not in Thunderbird.
2026‑02‑21 · CVE-2020-27748
MSRC 2026‑02‑21 Medium
CVE-2021-3565
A flaw was found in tpm2-tools in versions before 5.1.1 and before 4.3.2. tpm2_import used a fixed AES key for the inner wrapper potentially allowing a MITM attacker to unwrap the inner portion and reveal the key being imported. The highest threat from this vulnerability is to data confidentiality.
2026‑02‑21 · CVE-2021-3565
MSRC 2026‑02‑21 Medium
CVE-2021-28211
A heap overflow in LzmaUefiDecompressGetInfo function in EDK II.
2026‑02‑21 · CVE-2021-28211
MSRC 2026‑02‑21 Medium
CVE-2020-35503
A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU in versions before and including 6.0. This issue occurs in the megasas_command_cancelled() callback function while dropping a SCSI request. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
2026‑02‑21 · CVE-2020-35503
MSRC 2026‑02‑21 Medium
CVE-2021-23017
A security issue in nginx resolver was identified which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite resulting in worker process crash or potential other impact.
2026‑02‑21 · CVE-2021-23017
MSRC 2026‑02‑21 High
CVE-2021-3545
An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit this issue to leak memory from the host.
2026‑02‑21 · CVE-2021-3545
MSRC 2026‑02‑21 Medium
CVE-2021-32078
An Out-of-Bounds Read was discovered in arch/arm/mach-footbridge/personal-pci.c in the Linux kernel through 5.12.11 because of the lack of a check for a value that shouldn't be negative e.g. access to element -2 of an array aka CID-298a58e165e4.
2026‑02‑21 · CVE-2021-32078
MSRC 2026‑02‑21 High
CVE-2021-3546
An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET' command from the guest. It could allow a privileged guest user to crash the QEMU process on the host resulting in a denial of service condition or potential code execution with the privileges of the QEMU process.
2026‑02‑21 · CVE-2021-3546
MSRC 2026‑02‑21 High
CVE-2021-28210
An unlimited recursion in DxeCore in EDK II.
2026‑02‑21 · CVE-2021-28210
MSRC 2026‑02‑21 High
CVE-2021-26691
Apache HTTP Server mod_session response handling heap overflow
2026‑02‑21 · CVE-2021-26691
MSRC 2026‑02‑21 Critical
CVE-2021-31957
ASP.NET Core Denial of Service Vulnerability
2026‑02‑21 · CVE-2021-31957
MSRC 2026‑02‑21 Medium
CVE-2021-22897
curl 7.61.0 through 7.76.1 suffers from exposure of data element to wrong session due to a mistake in the code for CURLOPT_SSL_CIPHER_LIST when libcurl is built to use the Schannel TLS library. The selected cipher set was stored in a single "static" variable in the library which has the surprising side-effect that if an application sets up multiple concurrent transfers the last one that sets the ciphers will accidentally control the set used by all transfers. In a worst-case scenario this weakens transport security significantly.
2026‑02‑21 · CVE-2021-22897
MSRC 2026‑02‑21 Medium
CVE-2021-22898
curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option known as `CURLOPT_TELNETOPTIONS` in libcurl is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables libcurl could be made to pass on uninitialized data from a stack based buffer to the server resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.
2026‑02‑21 · CVE-2021-22898
MSRC 2026‑02‑21 Low
CVE-2021-22901
curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances to potentially reach remote code execution in the client. When libcurl at run-time sets up support for TLS 1.3 session tickets on a connection using OpenSSL it stores pointers to the transfer in-memory object for later retrieval when a session ticket arrives. If the connection is used by multiple transfers (like with a reused HTTP/1.1 connection or multiplexed HTTP/2 connection) that first transfer object might be freed before the new session is established on that connection and then the function will access a memory buffer that might be freed. When using that memory libcurl might even call a function pointer in the object making it possible for a remote code execution if the server could somehow manage to get crafted memory content into the correct
2026‑02‑21 · CVE-2021-22901
MSRC 2026‑02‑21 High
CVE-2021-29157
Dovecot before 2.3.15 allows ../ Path Traversal. An attacker with access to the local filesystem can trick OAuth2 authentication into using an HS256 validation key from an attacker-controlled location. This occurs during use of local JWT validation with the posix fs driver.
2026‑02‑21 · CVE-2021-29157
MSRC 2026‑02‑21 Medium
CVE-2021-31972
Event Tracing for Windows Information Disclosure Vulnerability
2026‑02‑21 · CVE-2021-31972
MSRC 2026‑02‑21 Medium
CVE-2021-22222
Infinite loop in DVB-S2-BB dissector in Wireshark 3.4.0 to 3.4.5 allows denial of service via packet injection or crafted capture file
2026‑02‑21 · CVE-2021-22222
MSRC 2026‑02‑21 High
CVE-2021-31962
Kerberos AppContainer Security Feature Bypass Vulnerability
2026‑02‑21 · CVE-2021-31962
MSRC 2026‑02‑21 Critical
CVE-2021-28091
Lasso all versions prior to 2.7.0 has improper verification of a cryptographic signature.
2026‑02‑21 · CVE-2021-28091
MSRC 2026‑02‑21 High
CVE-2021-33560
Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm and the window size is not chosen appropriately. This for example affects use of ElGamal in OpenPGP.
2026‑02‑21 · CVE-2021-33560
MSRC 2026‑02‑21 High
CVE-2020-17541
Libjpeg-turbo all version have a stack-based buffer overflow in the "transform" component. A remote attacker can send a malformed jpeg file to the service and cause arbitrary code execution or denial of service of the target service.
2026‑02‑21 · CVE-2020-17541
MSRC 2026‑02‑21 High
CVE-2018-10195
lrzsz before version 0.12.21~rc can leak information to the receiving side due to an incorrect length check in the function zsdata that causes a size_t to wrap around.
2026‑02‑21 · CVE-2018-10195
MSRC 2026‑02‑21 High
CVE-2021-3588
memory contents disclosure in cli_feat_read_cb
2026‑02‑21 · CVE-2021-3588
MSRC 2026‑02‑21 Low
CVE-2021-31978
Microsoft Defender Denial of Service Vulnerability
2026‑02‑21 · CVE-2021-31978
MSRC 2026‑02‑21 Medium
CVE-2021-31985
Microsoft Defender Remote Code Execution Vulnerability
2026‑02‑21 · CVE-2021-31985
MSRC 2026‑02‑21 High
CVE-2021-33739
Microsoft DWM Core Library Elevation of Privilege Vulnerability
2026‑02‑21 · CVE-2021-33739
MSRC 2026‑02‑21 High
CVE-2021-33741
Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
2026‑02‑21 · CVE-2021-33741
MSRC 2026‑02‑21 High
CVE-2021-34475
Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
2026‑02‑21 · CVE-2021-34475
MSRC 2026‑02‑21 Medium
CVE-2021-34506
Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
2026‑02‑21 · CVE-2021-34506
MSRC 2026‑02‑21 Medium
CVE-2021-31199
Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability
2026‑02‑21 · CVE-2021-31199
MSRC 2026‑02‑21 Medium
CVE-2021-31201
Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability
2026‑02‑21 · CVE-2021-31201
MSRC 2026‑02‑21 Medium
CVE-2021-31939
Microsoft Excel Remote Code Execution Vulnerability
2026‑02‑21 · CVE-2021-31939
MSRC 2026‑02‑21 High
CVE-2021-31980
Microsoft Intune Management Extension Remote Code Execution Vulnerability
2026‑02‑21 · CVE-2021-31980
MSRC 2026‑02‑21 High
CVE-2021-31940
Microsoft Office Graphics Remote Code Execution Vulnerability
2026‑02‑21 · CVE-2021-31940
MSRC 2026‑02‑21 High
CVE-2021-31941
Microsoft Office Graphics Remote Code Execution Vulnerability
2026‑02‑21 · CVE-2021-31941
MSRC 2026‑02‑21 High
CVE-2021-31949
Microsoft Outlook Remote Code Execution Vulnerability
2026‑02‑21 · CVE-2021-31949
MSRC 2026‑02‑21 High
CVE-2021-31965
Microsoft SharePoint Server Information Disclosure Vulnerability
2026‑02‑21 · CVE-2021-31965
MSRC 2026‑02‑21 Medium
CVE-2021-26420
Microsoft SharePoint Server Remote Code Execution Vulnerability
2026‑02‑21 · CVE-2021-26420
MSRC 2026‑02‑21 High
CVE-2021-31963
Microsoft SharePoint Server Remote Code Execution Vulnerability
2026‑02‑21 · CVE-2021-31963
MSRC 2026‑02‑21 High
CVE-2021-31966
Microsoft SharePoint Server Remote Code Execution Vulnerability
2026‑02‑21 · CVE-2021-31966
MSRC 2026‑02‑21 High
CVE-2021-31964
Microsoft SharePoint Server Spoofing Vulnerability
2026‑02‑21 · CVE-2021-31964
MSRC 2026‑02‑21 High
CVE-2021-31948
Microsoft SharePoint Server Spoofing Vulnerability
2026‑02‑21 · CVE-2021-31948
MSRC 2026‑02‑21 High
CVE-2021-31950
Microsoft SharePoint Server Spoofing Vulnerability
2026‑02‑21 · CVE-2021-31950
MSRC 2026‑02‑21 High
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