Quick answers
- Is CVE-2026-77102 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77102 being exploited in the wild.
- How severe is CVE-2026-77102?
- High severity, with a CVSS score of 7.5, published 8 September 2026.
- Which products and versions are affected?
- Commvault CommServe 11.36.0-11.36.122, 11.40.0-11.40.71, 11.44.0-11.44.19, 11.46.0-11.46.19.
- Is there a fix for CVE-2026-77102?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-77102 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-77102?
- Check whether you run Commvault CommServe 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.
Technical details
A heap-based buffer overflow vulnerability exists in CommServe, the central management and coordination service in Commvault's backup platform. The vulnerability is reachable over the network and can be triggered without prior authentication. Exploitation causes a denial of service through service crash. Affected versions include CommServe 11.36.0–11.36.122, 11.40.0–11.40.71, 11.44.0–11.44.19, and 11.46.0–11.46.19. Patches are available in maintenance releases 11.36.123 and higher, 11.40.72 and higher, 11.44.20 and higher, and 11.46.20 and higher respectively.
Affected products
- Commvault CommServe 11.36.0-11.36.122, 11.40.0-11.40.71, 11.44.0-11.44.19, 11.46.0-11.46.19
Timeline
- 2026-09-08: disclosed