# MA-954.072023: MyCERT Advisory - Mozilla Releases Security Update for Firefox and Firefox ESR

**Date:** 13 Jul 2023  
**Source:** https://www.mycert.org.my/portal/advisory?id=MA-954.072023  
**Advisory ID:** MA-954.072023

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**1.0 Introduction**
Recently, Mozilla has released a security update to address a vulnerability in Firefox and Firefox ESR.
**2.0 Impact**
An attacker could exploit this vulnerability to take control of an affected system.
**3.0 Affected Products**
Mozilla Firefox and Firefox ESR.
**4.0 Recommendations**
MyCERT encourages users and administrators to review Mozilla Security Advisory [MFSA 2023-26](https://www.mozilla.org/en-US/security/advisories/mfsa2023-26/) and apply the necessary update.
Kindly refer to <https://www.mozilla.org/en-US/security/advisories/mfsa2023-26/>
Generally, MyCERT advises the users of this devices to be updated with the latest security announcements by the vendor and follow best practice security policies to determine which updates should be applied.
For further enquiries, please contact MyCERT through the following channels:
E-mail: cyber999[at]cybersecurity.my 
Phone: 1-300-88-2999 (monitored during business hours) 
Mobile: +60 19 2665850 (24x7 call incident reporting) 
Business Hours: Mon - Fri 09:00 -18:00 MYT 
Web: <https://www.mycert.org.my> 
Twitter: <https://twitter.com/mycert> 
Facebook: <https://www.facebook.com/mycert.org.my>
**5.0    References**
<https://www.mozilla.org/en-US/security/advisories/mfsa2023-26/>