Data Breaches

Adobe Says Critical PDF Reader Zero-Day Being Exploited 

Adobe raises an alarm for new in-the-wild zero-day attacks hitting users of its widely deployed Adobe Acrobat and Reader product.

Adobe vulnerabilities

Software maker Adobe on Tuesday raised an alarm about new in-the-wild zero-day attacks hitting users of its widely deployed Adobe Acrobat and Reader product.

As part of its scheduled batch of Patch Tuesday updates, Adobe warned that hackers are exploiting a remotely exploitable vulnerability — CVE-2023-26369 — to launch code execution attacks.

Adobe describes the flaw as an out-of-bounds write memory safety issue affecting both Windows and macOS installations.

“Successful exploitation could lead to arbitrary code execution. Adobe is aware that CVE-2023-26369 has been exploited in the wild in limited attacks targeting Adobe Acrobat and Reader,” the company said in an advisory.

Adobe did not specify which operating system is being targeted by in-the-wild attackers.

The Adobe Acrobat and Reader patch headlines a Patch Tuesday release that provides fixes for at least five documented flaws across multiple products.

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The company also pushed out a security update for Adobe Connect to fix a pair of bugs that could be exploited to launch arbitrary code execution attacks.   

A separate patch was rolled out to fix two documented flaws in Adobe Experience Manager (AEM) and warned that successful exploitation of these vulnerabilities could result in arbitrary code execution.

So far this year, there has 64 documented in-the-wild zero-day attacks hitting a wide range of software products, according to data tracked by SecurityWeek.

Related: Patch Tuesday: Adobe Patches 30 Acrobat, Reader Vulns

Related: Adobe Patch Tuesday: Critical Flaws Haunt InDesign, ColdFusion

Related: Adobe Patch Tuesday: Code Execution Flaws in Acrobat, Reader

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Nearly half of the security holes, most allowing arbitrary code execution, have been fixed in Adobe’s Experience Manager product.

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While none of the flaws have been exploited in the wild, many of them could lead to arbitrary code execution.

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Critical ColdFusion vulnerabilities are the most at risk of being exploited in attacks, according to the software giant.

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The security defects allow attackers to escalate privileges and execute arbitrary code remotely.

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The vulnerability is tracked as CVE-2026-34621 and Adobe has confirmed that it can be exploited for arbitrary code execution.

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Tracked as UNC6783, the threat actor is likely linked to Mr. Raccoon, the hacker behind the alleged theft of Adobe data from a BPO.

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Reputable researcher Haifei Li has come across what appears to be a PDF designed to exploit an unpatched vulnerability.

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Adobe has rolled out patches for 80 vulnerabilities across 8 products, including Commerce, Illustrator, Acrobat Reader, and Premiere Pro.

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