Adobe’s September update fixes 23 critical flaws in Flash Player

Adobe’s monthly update for September is a little later than its usual Patch Tuesday release but it's not aware of any of them being attacked in the wild yet.

Adobe has released updates for 23 bugs affecting Flash Player and AIR on all platforms and browsers. The critical bugs affect the plugin for Windows and Mac, Chrome, Internet Explorer, Edge, and Linux.

The update brings the latest version of Flash Player for Mac, Windows, Chrome, IE and Edge on Windows 10, and IE 10 and 11 on Windows 8.0 and 8.1 to The latest version for Linux is

“These updates address critical vulnerabilities that could potentially allow an attacker to take control of the affected system,” Adobe noted in an advisory on Monday.

Unlike some of the recent Flash Player updates, Adobe said it was not aware of attacks in the wild on any of the vulnerabilities in this update. Still, Adobe urges users to install the updates as a priority for all editions except for Linux. It’s not uncommon for web attacks for Flash Player flaws to appear in exploit kits soon after Adobe releases fixes. In addition, 18 of the 23 bugs could lead to code execution.

The update comes a little later than usual. Since 2012 Adobe has timed the release of security fixes for Flash Player to fall on the second Tuesday of each month alongside Microsoft’s monthly fixes, however this month’s Patch Tuesday only saw fixes for Adobe Shockwave.

An Adobe spokeswoman told CSO Australia the later than usual due to additional testing.

“We aim to align our security patches with the Patch Tuesday schedule, but from time to time will release on a different date for various reasons. In this case, Flash Player features required some additional testing,” she said.

Google’s Project Zero team continues its record for finding bugs in Flash Player. It was credited with reporting 10 of this months flaws after being credited with 24 of 35 bugs Adobe in Flash Player last month. Others credited in this month’s update included independent researchers Ben Hayak, billow and Malte Batram, as well as researchers at Alibaba, Tencent, AddReality and Qihoo 360. The Keen Team also reported an issue through HP’s Zero Day Initiative.

The update also follows last month's moves by Google and Amazon to limit the role of Flash Player in online advertising.

Blast from the past?

Try our new Space Invaders inspired video game NOW.

What score can you get ?

Join the CSO newsletter!

Error: Please check your email address.

Tags VulnerabilitiesMacLinuxflash playerWindowscritical flawsadobechromeCSO AustraliaIEPatch Tuesday

More about CSOGoogleHPLinuxMicrosoft

Show Comments

Featured Whitepapers

Editor's Recommendations

Solution Centres

Stories by Liam Tung

Latest Videos

  • 150x50

    CSO Webinar: The Human Factor - Your people are your biggest security weakness

    ​Speakers: David Lacey, Researcher and former CISO Royal Mail David Turner - Global Risk Management Expert Mark Guntrip - Group Manager, Email Protection, Proofpoint

    Play Video

  • 150x50

    CSO Webinar: Current ransomware defences are failing – but machine learning can drive a more proactive solution

    Speakers • Ty Miller, Director, Threat Intelligence • Mark Gregory, Leader, Network Engineering Research Group, RMIT • Jeff Lanza, Retired FBI Agent (USA) • Andy Solterbeck, VP Asia Pacific, Cylance • David Braue, CSO MC/Moderator What to expect: ​Hear from industry experts on the local and global ransomware threat landscape. Explore a new approach to dealing with ransomware using machine-learning techniques and by thinking about the problem in a fundamentally different way. Apply techniques for gathering insight into ransomware behaviour and find out what elements must go into a truly effective ransomware defence. Get a first-hand look at how ransomware actually works in practice, and how machine-learning techniques can pick up on its activities long before your employees do.

    Play Video

  • 150x50

    CSO Webinar: Get real about metadata to avoid a false sense of security

    Speakers: • Anthony Caruana – CSO MC and moderator • Ian Farquhar, Worldwide Virtual Security Team Lead, Gigamon • John Lindsay, Former CTO, iiNet • Skeeve Stevens, Futurist, Future Sumo • David Vaile - Vice chair of APF, Co-Convenor of the Cyberspace Law And Policy Community, UNSW Law Faculty This webinar covers: - A 101 on metadata - what it is and how to use it - Insight into a typical attack, what happens and what we would find when looking into the metadata - How to collect metadata, use this to detect attacks and get greater insight into how you can use this to protect your organisation - Learn how much raw data and metadata to retain and how long for - Get a reality check on how you're using your metadata and if this is enough to secure your organisation

    Play Video

  • 150x50

    CSO Webinar: How banking trojans work and how you can stop them

    CSO Webinar: How banking trojans work and how you can stop them Featuring: • John Baird, Director of Global Technology Production, Deutsche Bank • Samantha Macleod, GM Cyber Security, ME Bank • Sherrod DeGrippo, Director of Emerging Threats, Proofpoint (USA)

    Play Video

  • 150x50

    IDG Live Webinar:The right collaboration strategy will help your business take flight

    Speakers - Mike Harris, Engineering Services Manager, Jetstar - Christopher Johnson, IT Director APAC, 20th Century Fox - Brent Maxwell, Director of Information Systems, THE ICONIC - IDG MC/Moderator Anthony Caruana

    Play Video

More videos

Blog Posts