🛡️ CVE-2026-21766

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs administrative privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
• Privileges required: High — administrative rights are needed first.
• User interaction: Required — someone has to click, open or visit something.
• Scope: Changed — a successful attack reaches components beyond the vulnerable one.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: None.
• Availability impact: None.

Weakness class

CVE-2026-21766 is classified as CWE-522: Insufficiently Protected Credentials. Credentials are stored or transmitted with protection too weak for what they unlock.

Affected software

CVE-2026-21766 is recorded against 1 package.

• unknown

Timeline and source

Published on 5 August 2026 and last revised on 6 August 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

support.hcl-software.com

Other advisories for this package

unknown has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2022-4995 (9.8 Critical, published 7 Aug 2026)
• CVE-2022-4994 (published 30 Jul 2026)
• CVE-2023-49900 (9.8 Critical, published 16 Jul 2026)
• CVE-2023-49899 (9.8 Critical, published 16 Jul 2026)
• CVE-2022-4989 (published 3 Jul 2026)
• CVE-2022-4990 (published 3 Jul 2026)
• CVE-2022-50973 (9.8 Critical, published 2 Jul 2026)
• CVE-2023-20572 (published 26 Jun 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-522: Insufficiently Protected Credentials) in other software:

• CVE-2026-16553 (5.0 Medium, published 17 Aug 2026)
• CVE-2026-49349 (6.8 Medium, published 12 Aug 2026)
• CVE-2026-12984 (8.2 High, published 10 Aug 2026)
• CVE-2026-71577 (6.3 Medium, published 10 Aug 2026)
• CVE-2026-47660 (published 7 Aug 2026)
• CVE-2026-71260 (6.5 Medium, published 5 Aug 2026)
• CVE-2026-17349 (9.6 Critical, published 31 Jul 2026)
• CVE-2026-56570 (3.7 Low, published 31 Jul 2026)

Details

Affected Packages

References