CVE-2026-85103 Heap-based Buffer Overflow in VPN Certificate ASN.1 Decoding
Unauthenticated remote attackers can execute arbitrary code via heap-based buffer overflow in VPN certificate ASN.1 decoding on Check Point Quantum systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85103?
CVE-2026-85103 is a critical memory corruption vulnerability in checkpoint Quantum Security Gateway, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A heap-based buffer overflow in VPN certificate ASN.1 decoding may allow an unauthenticated remote attacker to execute arbitrary code on Check Point Quantum Security Management and Quantum Security Gateway systems.
Weakness: CWE-122
Which versions are affected by CVE-2026-85103?
How do I fix CVE-2026-85103?
No fix has been published for CVE-2026-85103 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-85103 being exploited?
There is no known exploitation of CVE-2026-85103 in the wild and no public exploit code.
Sources
Also known as GHSA-g4cm-76f6-qvmc.