CVE-2021-27935
HIGHCVSS 7.5/10EPSS 4.12%
Last modified
CVE-2021-27935 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in AdGuard before 0.105.2. An attacker able to get the user's cookie is able to bruteforce their password offline, because the hash of the password is stored in the cookie.. EPSS estimates a 4.12% chance of exploitation in the next 30 days.
Description
An issue was discovered in AdGuard before 0.105.2. An attacker able to get the user's cookie is able to bruteforce their password offline, because the hash of the password is stored in the cookie.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Adguard | Adguard Home | < 0.105.2 |
References
- https://github.com/AdguardTeam/AdGuardHome/issues/2470Issue Tracking, Patch, Third Party Advisory
- https://github.com/AdguardTeam/AdGuardHome/issues/2470Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-27935?
An issue was discovered in AdGuard before 0.105.2. An attacker able to get the user's cookie is able to bruteforce their password offline, because the hash of the password is stored in the cookie.
How severe is CVE-2021-27935?
CVE-2021-27935 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.12% probability of exploitation in the next 30 days.
How do I fix CVE-2021-27935?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-27927In Zabbix from 4.0.x before 4.0.28rc1, 5.0.0alpha1 before 5.…8.8
- CVE-2021-27928A remote code execution issue was discovered in MariaDB 10.2…7.2
- CVE-2021-27930Multiple stored XSS vulnerabilities in IrisNext Edition 9.5.…5.4
- CVE-2021-27931LumisXP (aka Lumis Experience Platform) before 10.0.0 allows…9.1
- CVE-2021-27932Stormshield Network Security (SNS) VPN SSL Client 2.1.0 thro…7.8
- CVE-2021-27933pfSense 2.5.0 allows XSS via the services_wol_edit.php Descr…6.1
- CVE-2021-27938A vulnerability has been identified in the Silverstripe CMS …6.1
- CVE-2021-27940resources/public/js/orchestrator.js in openark orchestrator …6.1
- CVE-2021-27941Unconstrained Web access to the device's private encryption …4.6
- CVE-2021-27942Vizio P65-F1 6.0.31.4-2 and E50x-E1 10.0.31.4-2 Smart TVs al…6.8
- CVE-2021-27943The pairing procedure used by the Vizio P65-F1 6.0.31.4-2 an…7.5
- CVE-2021-27944Several high privileged APIs on the Vizio P65-F1 6.0.31.4-2 …9.8
Are you affected by CVE-2021-27935?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST