CVE-2026-7840

UltraVNC repeater through 1.8.2.2 contains a global buffer overflow in its embedded HTTP administration server. The functions wisenderr and wireplyhdr in repeater/webgui/webutils.c write the caller-supplied HTTP request URI into a fixed 1000-byte global buffer hdrbuf via unchecked sprintf calls...

EUVD-2026-40886

UltraVNC repeater through 1.8.2.2 contains a global buffer overflow in its embedded HTTP administration server. The functions wisenderr and wireplyhdr in repeater/webgui/webutils.c write the caller-supplied HTTP request URI into a fixed 1000-byte global buffer hdrbuf via unchecked sprintf calls...

CVE-2026-7840 UltraVNC repeater HTTP server global buffer overflow via long URI (pre-auth RCE)

UltraVNC repeater through 1.8.2.2 contains a global buffer overflow in its embedded HTTP administration server. The functions wisenderr and wireplyhdr in repeater/webgui/webutils.c write the caller-supplied HTTP request URI into a fixed 1000-byte global buffer hdrbuf via unchecked sprintf calls...

CVE-2026-7840

CVE-2026-7840 (UltraVNC repeater) : A global buffer overflow in the embedded HTTP administration server affects UltraVNC repeater versions up to 1.8.2.2. The functions wi_senderr() and wi_replyhdr() copy the caller-supplied HTTP request URI into a fixed 1000-byte buffer (hdrbuf) using unchecked s...

CVE-2026-7840 UltraVNC repeater HTTP server global buffer overflow via long URI (pre-auth RCE)

UltraVNC repeater through 1.8.2.2 contains a global buffer overflow in its embedded HTTP administration server. The functions wisenderr and wireplyhdr in repeater/webgui/webutils.c write the caller-supplied HTTP request URI into a fixed 1000-byte global buffer hdrbuf via unchecked sprintf calls...

CVE-2026-44042

UltraVNC repeater through 1.8.2.2 contains an off-by-one error in the Base64 decode helper used for HTTP Basic authentication. In repeater/webgui/webutils.c:817, the wiuudecode function checks whether the input length exceeds the output buffer with a strict greater-than comparison , while the...

CVE-2026-44042 UltraVNC repeater wi_uudecode off-by-one in base64 decode boundary check

UltraVNC repeater through 1.8.2.2 contains an off-by-one error in the Base64 decode helper used for HTTP Basic authentication. In repeater/webgui/webutils.c:817, the wiuudecode function checks whether the input length exceeds the output buffer with a strict greater-than comparison , while the...

EUVD-2026-40865

Buffer Overflow vulnerability in UTT nv518G nv518GV3v3.2.7-210919-161313 allows a remote attacker to cause a denial of service via the gohead/sub472f08 component...

EUVD-2026-40864

Buffer Overflow vulnerability in UTT nv518G nv518GV3v3.2.7-210919-161313 allows a remote attacker to cause a denial of service via the gohead/sub447CAC component...

EUVD-2026-40868

Buffer Overflow vulnerability in UTT nv518G nv518GV3v3.2.7-210919-161313 allows a remote attacker to cause a denial of service via the gohead/sub425994 component...

EUVD-2026-40866

Buffer Overflow vulnerability in UTT nv518G nv518GV3v3.2.7-210919-161313 allows a remote attacker to cause a denial of service via the gohead/sub416f28 component...

kernel: dlm: validate length in dlm_search_rsb_tree

A flaw was found in the Linux kernel's Distributed Lock Manager dlm module. An attacker could send specially crafted network messages with an oversized length parameter to the dlmdumprsbname function. This lack of validation can lead to an out-of-bounds write in the dlmsearchrsbtree function,...

UBUNTU-CVE-2026-54896

Oj Optimized JSON is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, when in object mode, Oj.dump is vulnerable to a heap buffer overflow when serializing Exception objects with a large :indent value. The serializer allocates a buffer sized for the object'...

GeoVision GeoWebPlayer Websocket Server connectInfo handler stack-based buffer overflow vulnerabilities

Summary Multiple exploitable stack-based buffer overflow vulnerabilities exist in the Websocket Server connectInfo handler functionality of GeoWebPlayer versions: 1.1.1.0. A specially crafted websocket message can lead to a arbitrary code execution. An attacker can stage a malicious webpage to...

CVE-2026-52190

CVE-2026-52190 affects UTT nv518G nv518GV3, version 3.2.7-210919-161313. A buffer overflow in the gohead/sub_448384 component allows a remote attacker to cause a denial of service. Marketed metrics indicate a CVSSv3.1 base score of 7.5 (HIGH) with network attack vector, no privileges required, no...

Oracle Linux 9 : glibc (ELSA-2026-33226)

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-33226 advisory. - CVE-2026-5450: Fix buffer overflow in scanf RHEL-172710 Tenable has extracted the preceding description block directly from the Oracle Linux security advisor...

RHEL 8 : postgresql:13 (RHSA-2026:34363)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:34363 advisory. PostgreSQL is an advanced object-relational database management system DBMS. Security Fixes: postgresql: PostgreSQL: Operating system accou...

AlmaLinux 9 : giflib (ALSA-2026:33501)

The remote AlmaLinux 9 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:33501 advisory. giflib: giflib: Denial of Service via buffer overflow in EGifGCBToExtension CVE-2026-26740 Tenable has extracted the preceding description block directly from the...

PT-2026-54930

Name of the Vulnerable Software and Affected Versions FatFs versions R0.16 and earlier Description An issue exists in the handling of long filenames when LFN Long File Name is enabled. The fno.fname variable can contain up to 255 characters, which may lead to a buffer overflow if callers copy thi...

RHEL 9 : giflib (RHSA-2026:33501)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:33501 advisory. giflib is a library for reading and writing gif images. Security Fixes: giflib: giflib: Denial of Service via buffer overflow in EGifGCBToExtension...