CVE-2026-57851

MSI KernCoreLib64.sys Privilege Escalation via IOCTL Handlers

MSI Feature Manager contains a local privilege escalation vulnerability in the KernCoreLib64.sys kernel driver that allows any locally logged-on user to perform arbitrary physical memory read/write and unrestricted I/O port operations by accessing exposed IOCTL handlers without administrator privileges. Attackers can exploit the accessible device object through IOCTL handlers to manipulate kernel objects, tamper with kernel-mode callbacks, bypass Protected Process Light protections, and disable security software.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed

Vendors

Icu-project Msi

Products

International Components For Unicode Kerncorelib64.sys

CVE-2026-56779

MaxKB < 2.10.0 - Server-Side Request Forgery via downloadCallbackUrl and download_url Parameters

MaxKB before 2.10.0 contains a server-side request forgery vulnerability in tool creation and update endpoints that allows authenticated users to make arbitrary server requests by supplying unvalidated downloadCallbackUrl and download_url parameters. Attackers with default workspace USER role can exploit this to access internal network services by providing malicious URLs to the ToolSerializer endpoints.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

1panel Maxkb

Products

Maxkb Maxkb

CVE-2026-56124

phpUploader < 2.0.2 Unauthenticated Database Exposure via index model

phpUploader before 2.0.2 contains an unauthenticated information disclosure vulnerability that allows remote attackers to access the full contents of the uploaded-files database table by visiting any page of the application. The index model executes an unbounded SELECT query and embeds the complete JSON-encoded result set in an inline script block, exposing uploader IP addresses, Argon2ID key hashes, internal filenames, and SHA-256 fingerprints.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Phpuploader Project Shimosyan

Products

Phpuploader Phpuploader

CVE-2026-56117

dhcpcd Heap Use-After-Free via Control Socket Handling

dhcpcd through 10.3.2, fixed in commit 78ea09e, contains a heap use-after-free vulnerability in the control socket handling within src/control.c that allows local unprivileged attackers to trigger memory corruption when privilege separation is disabled. Attackers can connect to the control socket and send a privileged command such as -x, causing control_recvdata() to free the client object while the same READ+HANGUP event subsequently reaches control_hangup() with the stale pointer, resulting in a use-after-free condition exploitable in deployments using --disable-privsep or where privsep initialization has failed with the control socket operating in mode 0666.

CVSS 4.0 · 5.7 Medium EPSS < 1% KEV · Not listed

Vendors

Dhcpcd Project Networkconfiguration

Products

Dhcpcd Dhcpcd

CVE-2026-56116

dhcpcd Memory Leak DoS via IPv6 Router Advertisement Handling

dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advertisement route information handling that allows an unauthenticated same-link attacker to cause denial of service by sending crafted Router Advertisements. Attackers can repeatedly send Router Advertisements containing Route Information options with a lifetime of zero, triggering unfreed allocations in routeinfo_findalloc() that cause linear memory exhaustion and eventual daemon crash.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Dhcpcd Project Networkconfiguration

Products

Dhcpcd Dhcpcd

CVE-2026-56115

Bootimus 0.1.70 Broken Access Control via JWTMiddleware Authorization Bypass

Bootimus through 0.1.70 contains a broken access control vulnerability that allows authenticated low-privileged users to perform administrative actions by exploiting missing role enforcement in the JWTMiddleware function in internal/auth/auth.go, which validates JWT tokens and account status but fails to inspect the is_admin flag. Attackers can send requests to any endpoint under the /api/users path to create new administrator accounts or reset administrator passwords, thereby gaining full control of the server and the ability to modify boot menus and installation scripts served to PXE clients.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Bootimus Networkconfiguration

Products

Bootimus Dhcpcd

CVE-2026-56114

dhcpcd Stack Out-of-Bounds Write in dhcp6_makemessage()

dhcpcd through 10.3.2, fixed in commit 2f00c7b, contains a one-byte stack out-of-bounds write vulnerability in dhcp6_makemessage() in src/dhcp6.c that allows unauthenticated same-link attackers to write beyond a fixed local buffer by serializing an oversized RFC6603 OPTION_PD_EXCLUDE option body. Attackers can send a crafted DHCPv6 ADVERTISE message containing an IA_PD IAPREFIX /0 with a valid OPTION_PD_EXCLUDE using an exclude prefix length of /121 through /128 to trigger the out-of-bounds write and potentially corrupt adjacent stack memory.

CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed

Vendors

Dhcpcd Project Networkconfiguration

Products

Dhcpcd Dhcpcd

CVE-2026-56113

dhcpcd Heap Use-After-Free in dhcp6_deprecateaddrs via DHCPv6 RENEW

dhcpcd through 10.3.2, fixed in commit 5733d3c, contains a heap use-after-free vulnerability that allows unauthenticated same-link attackers to crash the daemon by sending a crafted DHCPv6 RENEW reply with RFC6603 OPTION_PD_EXCLUDE and both preferred and valid lifetimes set to zero. Attackers acting as or impersonating a DHCPv6 server can trigger dhcp6_deprecatedele() to free a delegated child address while an outer TAILQ_FOREACH_SAFE iterator in dhcp6_deprecateaddrs() still holds the freed pointer, causing a use-after-free when TAILQ_REMOVE is reached.

CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed

Vendors

Dhcpcd Project Networkconfiguration

Products

Dhcpcd Dhcpcd

CVE-2026-56111

Marlin Firmware 2.1.2.7 Out-of-Bounds Write via M421 G-code Handler

Marlin Firmware through 2.1.2.7, fixed in commit 1f255d1, when built with MESH_BED_LEVELING enabled, contains an out-of-bounds write vulnerability in the M421 G-code handler that allows attackers to corrupt firmware memory by supplying out-of-range X and Y grid indices. Attackers can send a single crafted G-code command via USB serial, network interface, or malicious gcode file to write an attacker-controlled 32-bit float value past the z_values array bounds, corrupting adjacent firmware variables and causing denial of service or firmware state corruption.

CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed

Vendors

Marlinfirmware Marlinfw

Products

Marlin Marlin Firmware

CVE-2026-53994

ProFTPD mod_sftp Heap Buffer Overflow via Unsigned Integer Underflow and Size Truncation

ProFTPD mod_sftp contains a heap-based buffer overflow reachable by an authenticated SFTP user. The fxp_packet_read() function accepts the attacker-supplied 32-bit big-endian SFTP packet length without a minimum sanity check. A value of 0 causes an unsigned subtraction elsewhere in the read path to underflow to approximately 4 GB. That oversized request reaches the core memory allocator, where the rounded size is computed in size_t but passed to new_block() as a 32-bit int; the low 32 bits of 0x100000000 are 0, so new_block() returns a small (~512-byte) block while the caller is told it received ~4 GB. The subsequent fill loop then streams attacker-controlled bytes past the end of the 544-byte allocation, producing an attacker-controlled heap buffer overflow. An authenticated user can crash the per-connection ProFTPD session child on demand with a single malformed SFTP packet (packet_len=0 followed by a body greater than approximately 544 bytes), producing reliable authenticated remote denial of service. Depending on heap layout and adjacent allocations, heap metadata corruption and further consequences beyond denial of service may be possible, though only denial of service is demonstrated by the supplied proof of concept.

CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed

Vendors

Proftpd Proftpd Project

Products

Proftpd Proftpd

CVE-2026-49954

Discuz! X5.0 Local File Inclusion via enable_disable.php Plugin Directory

Discuz! X5.0 releases 20260320 through 20260610 contain a local file inclusion vulnerability that allows authenticated administrators to execute arbitrary code by importing a specially crafted plugin configuration containing path traversal sequences in the directory attribute. Attackers can trigger an exception during plugin installation to bypass sanitization routines, causing malicious paths to be stored unsanitized and subsequently passed to include(), which combined with file upload functionality escalates to arbitrary code execution in the context of the web server user.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed

Vendors

Discuz

Products

Discuzx

CVE-2026-49953

Discuz! X5.0 CAPTCHA Bypass via Predictable Character Set

Discuz! X5.0 releases 20260320 through 20260610 contains a CAPTCHA bypass vulnerability that allows unauthenticated remote attackers to defeat challenge controls by exploiting limited complexity and predictable character sets in generated CAPTCHA images. Attackers can train a custom optical character recognition model against collected CAPTCHA samples to reliably predict challenge text, bypassing protections on login, registration, and other functionality from automated abuse.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Discuz

Products

Discuzx

CVE-2026-49952

Discuz! X5.0 Authentication Bypass via dbbak.php Encryption Oracle

Discuz! X5.0 releases 20260320 through 20260501 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to gain unauthorized access to database backup and restore functionality by exploiting a shared cryptographic key between UCenter integration and the database backup API exposed by dbbak.php. Attackers can inject a crafted payload through the username parameter during login to abuse the encryption oracle in logging_ctl::logging_more(), obtain a legitimately signed token, and use it to bypass authorization for database export and import operations, with the additional ability to trigger a race condition to impersonate arbitrary users.

CVSS 4.0 · 9.3 Critical EPSS 4.7% KEV · Not listed

Vendors

Discuz

Products

Discuzx

CVE-2026-49140

Nanobot < 0.2.1 Denial of Service via Matrix Media Download Handler

Nanobot prior to version 0.2.1 contains a denial of service vulnerability in the Matrix channel media download handler that allows authenticated room members to exhaust process memory and bandwidth by sending media events with missing or invalid size metadata. Attackers can send multiple concurrent Matrix media events with omitted or invalid declared sizes to trigger simultaneous large media downloads that fully materialize response bodies before post-download rejection, consuming process resources until service degradation occurs.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Hkuds Nanobot

Products

Nanobot Nanobot

CVE-2026-49139

Nanobot < 0.2.1 SSRF via Microsoft Teams Channel serviceUrl Poisoning

Nanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the Microsoft Teams channel handler that allows remote attackers to exfiltrate Bot Framework bearer tokens by supplying a forged activity with an attacker-controlled serviceUrl value. Attackers can poison the stored conversation reference by sending a crafted inbound activity to the Teams webhook, causing subsequent bot replies to transmit token-bearing Authorization header requests to an attacker-controlled host.

CVSS 4.0 · 7 High EPSS < 1% KEV · Not listed

Vendors

Hkuds Nanobot

Products

Nanobot Nanobot

CVE-2026-49138

Nanobot < 0.2.1 SSRF via web_fetch Tool Redirect Following

Nanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the web_fetch tool that allows remote attackers to reach internal or private network hosts by supplying a URL that redirects to a loopback or private address via a 3xx Location header. Attackers can exploit the automatic HTTP redirect following behavior in the httpx library to bypass initial URL validation and cause the runtime to send outbound requests to internal hosts before final resolved URL validation is applied.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Hkuds Nanobot

Products

Nanobot Nanobot

CVE-2026-49130

Music Player Daemon < 0.24.11 CRLF Injection via XspfPlaylistPlugin.cxx

Music Player Daemon (MPD) before version 0.24.11 contains a CRLF injection vulnerability in the xspf_char_data function within the XSPF playlist plugin that allows attackers to embed literal CR/LF bytes in URI fields by supplying a malicious XSPF playlist with XML numeric character references. Attackers can inject forged key-value lines through the location field into MPD protocol responses including playlistinfo, currentsong, and listplaylist outputs, as well as the state file writer, by exploiting Expat's decoding of numeric character references prior to the character data callback.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Musicpd Musicplayerdaemon

Products

Music Player Daemon Mpd

CVE-2026-49129

Music Player Daemon < 0.24.11 SSRF via CurlInputPlugin

Music Player Daemon (MPD) before version 0.24.11 contains a server-side request forgery vulnerability in CurlInputPlugin where CURLOPT_FOLLOWLOCATION is set without CURLOPT_REDIR_PROTOCOLS_STR, allowing unauthenticated attackers to bypass the http/https scheme restriction by causing a malicious HTTP server to redirect to non-HTTP protocols such as gopher, ftp, sftp, ldap, dict, rtmp, or rtsp. Attackers can trigger this vulnerability via MPD commands that initiate URL fetches, including add, readcomments, albumart, readpicture, or load, to interact with internal or restricted network services on systems running libcurl versions prior to 7.85.0.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Musicpd Musicplayerdaemon

Products

Music Player Daemon Mpd

CVE-2026-49128

Music Player Daemon < 0.24.11 Path Traversal via LocalStorage URI Handling

Music Player Daemon (MPD) before version 0.24.11 contains a path traversal vulnerability in LocalStorage::MapFSOrThrow and LocalStorage::MapUTF8 within the local storage plugin, where the on-disk path is constructed by joining the storage root with a user-supplied URI as plain strings without canonicalization, allowing '..' segments to survive into the resolved path and be flattened by the kernel at openat() time. An unauthenticated attacker can exploit this flaw using the listfiles command to enumerate names, sizes, and modification times of arbitrary directories readable by the MPD process, and the albumart command to read image files in any attacker-chosen directory outside the configured music_directory.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Musicpd Musicplayerdaemon

Products

Music Player Daemon Mpd

CVE-2026-49127

Music Player Daemon < 0.24.11 Stack Buffer Overflow via pcm_unpack_24be

Music Player Daemon (MPD) before version 0.24.11 contains a stack buffer overflow vulnerability in the pcm_unpack_24be function in src/pcm/Pack.cxx that allows unauthenticated attackers to corrupt stack memory by triggering an off-by-one write in the PCM decoder plugin. Attackers can issue two MPD commands referencing a malicious HTTP audio source to cause the unpack loop to write 1366 entries into a 1365-entry buffer, overwriting four bytes past the array boundary with three attacker-controlled bytes from an HTTP response body, resulting in daemon termination or potential code execution.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Musicpd Musicplayerdaemon

Products

Music Player Daemon Mpd