Quick answers
- Is CVE-2026-88964 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-88964 being exploited in the wild.
- How severe is CVE-2026-88964?
- Informational severity, published 13 October 2026.
- Which products and versions are affected?
- Openvpn 2.7_alpha3 through 2.7.7.
- Is there a fix for CVE-2026-88964?
- Yes: fixed in 2.7.8. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-88964 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-88964?
- Check whether you run Openvpn at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 2.7.8
Technical details
An integer underflow vulnerability exists in OpenVPN's handling of PUSH_UPDATE domain search options, affecting Windows and Android platforms in versions 2.7_alpha3 through 2.7.7. The vulnerability requires an authenticated remote server to send crafted packets, leading to out-of-bounds memory access. This results in either denial of service (application crash) or memory disclosure, with a fix available in version 2.7.8.
Affected products
- OpenVPN OpenVPN 2.7_alpha3 through 2.7.7
Timeline
- 2026-10-13: disclosed
- 2026-10-13: patched: Fixed in version 2.7.8