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ESB-2026.3571 PUBLISHED CVSS 1.7999999523162842 LOW

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3571 K000160723: libxslt vulnerability CVE-2025-10911 14 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: F5OS-A F5OS-C Publisher: F5 Networks Operating System: F5 Resolution: Patch/Upgrade CVE Names: CVE-2025-10911 Original Bulletin: https://my.f5.com/manage/s/article/K000160723 Comment: CVSS (Max): 1.8 CVE-2025-10911 (CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L) CVSS Source: F5 Networks Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L EPSS (Max): 0.0% (3rd) CVE-2025-10911 2026-04-13 - --------------------------BEGIN INCLUDED TEXT-------------------- K000160723: libxslt vulnerability CVE-2025-10911 Published Date: Apr 13, 2026 Security Advisory Description A use-after-free vulnerability was found in libxslt while parsing XSL nodes that may lead to the dereference of expired pointers and application crash. ( CVE-2025-10911) Impact An attacker can exploit this vulnerability to cause an application to terminate resulting in a Denial of Service (DoS). Security Advisory Status F5 Product Development has assigned ID 2225269 (F5OS-A and F5OS-C) to this vulnerability. To determine if your product and version have been evaluated for this vulnerability, refer to the Evaluated products box. To determine if your release is known to be vulnerable, the components or features that are affected by the vulnerability, and for information about releases, point releases, or hotfixes that address the vulnerability, refer to the following tables. You can also use iHealth to diagnose a vulnerability for BIG-IP, BIG-IQ, and F5OS systems. For more information about using iHealth, refer to K27404821: Using F5 iHealth to diagnose vulnerabilities. For more information about security advisory versioning, refer to K51812227: Understanding security advisory versioning. In this section o BIG-IP Next o BIG-IP and BIG-IQ o F5 Distributed Cloud and NGINX Services o F5OS o NGINX o Other products BIG-IP Next Note: After F5 releases a fix for a given branch, that fix applies to all subsequent minor, maintenance, and point releases for that branch; F5 will not list additional fixes for that branch in the table. For example, when F5 releases a fix in BIG-IP Next SPK 2.0.1, the fix also applies to 2.0.2 and all later 2.0.x releases. For more information, refer to K51812227: Understanding security advisory versioning. +-------------+------+-----------------+----------+----------+----------------+ | | |Versions known to|Fixes |Severity/ |Vulnerable | |Product |Branch|be vulnerable^1 |introduced|CVSS score|component or | | | | |in | |feature | +-------------+------+-----------------+----------+----------+----------------+ |BIG-IP Next |All |None |Not |Not |None | |SPK | | |applicable|vulnerable| | +-------------+------+-----------------+----------+----------+----------------+ |BIG-IP Next | | |Not |Not | | |CNF |All |None |applicable|vulnerable|None | | | | | | | | +-------------+------+-----------------+----------+----------+----------------+ |BIG-IP Next | | |Not |Not | | |for |All |None |applicable|vulnerable|None | |Kubernetes | | | | | | +-------------+------+-----------------+----------+----------+----------------+ ^1F5 evaluates only software versions that have not yet reached the End of Technical Support (EoTS) phase of their lifecycle. For more information, refer to the Security hotfixes section of K4602: Overview of the F5 security vulnerability response policy. BIG-IP and BIG-IQ Note: After F5 releases a fix for a given branch, that fix applies to all subsequent minor, maintenance, and point releases for that branch; F5 will not list additional fixes for that branch in the table. For example, when F5 releases a fix in 17.1.2.1, the fix also applies to 17.1.2.2 and all later 17.1.x releases (17.1.3.x, 17.1.4.x). For more information, refer to K51812227: Understanding security advisory versioning. +--------------+------+-----------------+----------+----------+---------------+ | | |Versions known to|Fixes |Severity/ |Vulnerable | |Product |Branch|be vulnerable^1 |introduced|CVSS score|component or | | | | |in | |feature | +--------------+------+-----------------+----------+----------+---------------+ |BIG-IP (all |All |None |Not |Not |None | |modules) | | |applicable|vulnerable| | +--------------+------+-----------------+----------+----------+---------------+ |BIG-IQ | | |Not |Not | | |Centralized |All |None |applicable|vulnerable|None | |Management | | | | | | +--------------+------+-----------------+----------+----------+---------------+ ^1F5 evaluates only software versions that have not yet reached the End of Technical Support (EoTS) phase of their lifecycle. For more information, refer to the Security hotfixes section of K4602: Overview of the F5 security vulnerability response policy. F5 Distributed Cloud and NGINX Services +-------------------------------+-----------------+---------------------------+ |Service |Severity/CVSS |Vulnerable component or | | |score |feature | +-------------------------------+-----------------+---------------------------+ |F5 Distributed Cloud (all |Not vulnerable |None | |services) | | | +-------------------------------+-----------------+---------------------------+ |F5 Silverline (all services) |Not vulnerable |None | +-------------------------------+-----------------+---------------------------+ |NGINX One Console |Not vulnerable |None | +-------------------------------+-----------------+---------------------------+ F5OS +-------+------+-------------------+-----------+------------+-----------------+ | | |Versions known to |Fixes |Severity/ |Vulnerable | |Product|Branch|be vulnerable^1 |introduced |CVSS score^2|component or | | | | |in | |feature | +-------+------+-------------------+-----------+------------+-----------------+ | | |1.8.0 - 1.8.3 | |Low/1.8 | | |F5OS-A |1.x |1.5.1 - 1.5.4 |None |(CVSS v3.1) |XSLT library | | | | | | | | +-------+------+-------------------+-----------+------------+-----------------+ | | |1.8.0 - 1.8.2 | |Low/1.8 | | |F5OS-C |1.x |1.6.0 - 1.6.4 |None |(CVSS v3.1) |XSLT library | | | | | | | | +-------+------+-------------------+-----------+------------+-----------------+ ^1F5 evaluates only software versions that have not yet reached the End of Technical Support (EoTS) phase of their lifecycle. For more information, refer to the Security hotfixes section of K4602: Overview of the F5 security vulnerability response policy. ^2Starting with the August 2024 Quarterly Security Notification, F5 will provide the CVSS v4.0 base score in addition to the CVSS v3.1 score, for first-party security issues only. The CVSS score link takes you to a resource outside of MyF5, and the content may be removed without our knowledge. For more information about how F5 uses CVSS v4.0, refer to K000140363: Overview of CVSS v4.0 in F5 security advisories. NGINX +-----------+------+------------------+----------+----------+-----------------+ | | |Versions known to |Fixes |Severity/ |Vulnerable | |Product |Branch|be vulnerable^1 |introduced|CVSS score|component or | | | | |in | |feature | +-----------+------+------------------+----------+----------+-----------------+ |NGINX (all |All |None |Not |Not |None | |products) | | |applicable|vulnerable| | +-----------+------+------------------+----------+----------+-----------------+ ^1F5 evaluates only software versions that have not yet reached the End of Technical Support (EoTS) phase of their lifecycle. For more information, refer to the Security hotfixes section of K4602: Overview of the F5 security vulnerability response policy. Other products +-------+------+-------------------+-----------+-----------+------------------+ | | |Versions known to |Fixes |Severity/ |Vulnerable | |Product|Branch|be vulnerable^1 |introduced |CVSS score |component or | | | | |in | |feature | +-------+------+-------------------+-----------+-----------+------------------+ |Traffix|All |None |Not |Not |None | |SDC | | |applicable |vulnerable | | +-------+------+-------------------+-----------+-----------+------------------+ |F5 AI |All |None |Not |Not |None | |Gateway| | |applicable |vulnerable | | +-------+------+-------------------+-----------+-----------+------------------+ ^1F5 evaluates only software versions that have not yet reached the End of Technical Support (EoTS) phase of their lifecycle. For more information, refer to the Security hotfixes section of K4602: Overview of the F5 security vulnerability response policy. Security Advisory Recommended Actions If you are running a version listed in the Versions known to be vulnerable column, you can eliminate this vulnerability by installing a version listed in the Fixes introduced in column. If the Fixes introduced in column does not list a version for your branch, then no update candidate currently exists for that branch and F5 recommends that you upgrade to a version with the fix (refer to the tables). If the Fixes introduced in column lists a version prior to the one you are running, in the same branch, then your version should have the fix. Mitigation None Related Content o K41942608: Overview of MyF5 security advisory articles o K12201527: Overview of Quarterly Security Notifications o K51812227: Understanding security advisory versioning o K4602: Overview of the F5 security vulnerability response policy o K4918: Overview of the F5 critical issue hotfix policy o K39757430: F5 product and services lifecycle policy index o K000090258: Download F5 products from MyF5 o K9970: Subscribe to email notifications regarding F5 products and security announcements o K9957: Creating a custom RSS feed to view new and updated documents o K000135931: Contact F5 Support - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================

Risk Scores

CVSS v3.1
1.7999999523162842
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L

Affected Products

VendorProductVersions
F5 NetworksF5OS-A

Timeline

References

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