Detections
Analytics
TencentOS Server 3: flute, libbase, libfonts, libformula, liblayout, libloader, libreoffice, librepository, libserializer, pentaho-libxml, pentaho-reporting-flow-engine, and sac (TSSA-2026:1418)
high Nessus Plugin ID 379287
Synopsis
The remote TencentOS Server 3 host is missing one or more security updates.Description
The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:1418 advisory.Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:
CVE-2026-63274:
LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing a stream object.
The length of the stream was taken from the object's own dictionary and was not checked against the number of bytes actually present, so copying the stream read and wrote past the end of the buffer holding it. In fixed versions the declared length is clamped to the bytes actually read.
CVE-2026-63275:
LibreOffice can read CFF fonts, which may be embedded in documents. A stack buffer overflow existed when reading the hints of a glyph. The number of hints was checked against the wrong bound, so a glyph declaring more hints than the array can hold wrote past its end. In fixed versions the hint count is checked against the capacity the array really has.
CVE-2026-63276:
LibreOffice converts CFF fonts to Type 1 when it subsets a font, which happens when a document is exported to PDF, and CFF fonts may be embedded in documents. A stack buffer overflow existed in that conversion.
The converted operators were written into a fixed size buffer with no check that they still fit, so a glyph emitting many operators wrote past the end of the buffer. In fixed versions the remaining capacity is tracked and the conversion stops when it is used up.
CVE-2026-63277:
LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document.
A document could name a Java database driver for such a link to be loaded from a remote location, so opening the document could run Java code from that location. In fixed versions an entry in a Java class path has to be a file URL.
Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages.See Also
Plugin Details
Severity: High
ID: 379287
File Name: tencentos_TSSA_2026_1418.nasl
Version: 1.1
Type: Local
Family: Tencent Local Security Checks
Published: 11/11/2026
Updated: 11/11/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.9
Percentile: 96.31
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 5.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-63277
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 7
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS v4
Risk Factor: High
Base Score: 8.5
Threat Score: 7.1
Threat Vector: CVSS:4.0/E:P
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Vulnerability Information
CPE: cpe:/o:tencent:tencentos_server:3, p-cpe:/a:tencent:tencentos_server:flute, p-cpe:/a:tencent:tencentos_server:libbase, p-cpe:/a:tencent:tencentos_server:libfonts, p-cpe:/a:tencent:tencentos_server:libformula, p-cpe:/a:tencent:tencentos_server:liblayout, p-cpe:/a:tencent:tencentos_server:libloader, p-cpe:/a:tencent:tencentos_server:libreoffice, p-cpe:/a:tencent:tencentos_server:librepository, p-cpe:/a:tencent:tencentos_server:libserializer, p-cpe:/a:tencent:tencentos_server:pentaho-libxml, p-cpe:/a:tencent:tencentos_server:pentaho-reporting-flow-engine, p-cpe:/a:tencent:tencentos_server:sac
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/etc/os-release, Host/TencentOS/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 10/22/2026
Vulnerability Publication Date: 9/22/2026
Reference Information
CVE: CVE-2026-63274, CVE-2026-63275, CVE-2026-63276, CVE-2026-63277
IAVB: 2026-B-0272-S