CVE-2023-21598 Adobe InCopy Font Parsing Use-After-Free Information Disclosure Vulnerability
An attacker can disclose sensitive memory and bypass ASLR by tricking a user into opening a malicious file in Adobe InCopy.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-21598?
CVE-2023-21598 is a medium-severity use after free vulnerability in Adobe Incopy, published on 13 Jan 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Adobe InCopy versions 18.0 (and earlier), 17.4 (and earlier) are affected by a Use After Free vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Weakness: CWE-416
Which versions are affected by CVE-2023-21598?
It affects 1 product.
Products include Adobe Incopy.
How do I fix CVE-2023-21598?
No fix has been published for CVE-2023-21598 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2023-21598 being exploited?
There is no known exploitation of CVE-2023-21598 in the wild and no public exploit code.
Other vulnerabilities in Adobe Incopy
- CVE-2021-21090 Adobe InCopy DOCX file parsing directory traversal vulnerability could lead to remote code execution
- CVE-2026-34706 InCopy | Out-of-bounds Write (CWE-787)
- CVE-2026-34707 InCopy | Heap-based Buffer Overflow (CWE-122)
- CVE-2026-34708 InCopy | Stack-based Buffer Overflow (CWE-121)
- CVE-2026-27287 InCopy | Out-of-bounds Read (CWE-125)
Sources
Also known as GHSA-55x4-ghv8-8v8m.