CVE-2021-26530
CRITICALCVSS 9.1/10EPSS 1.45%
Last modified
CVE-2021-26530 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. The mg_tls_init function in Cesanta Mongoose HTTPS server 7.0 (compiled with OpenSSL support) is vulnerable to remote OOB write attack via connection request after exhausting memory pool.. EPSS estimates a 1.45% chance of exploitation in the next 30 days.
Description
The mg_tls_init function in Cesanta Mongoose HTTPS server 7.0 (compiled with OpenSSL support) is vulnerable to remote OOB write attack via connection request after exhausting memory pool.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cesanta | Mongoose | 7.0 |
References
- https://github.com/cesanta/mongoose/issues/1204Exploit, Third Party Advisory
- https://github.com/cesanta/mongoose/issues/1204Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-26530?
The mg_tls_init function in Cesanta Mongoose HTTPS server 7.0 (compiled with OpenSSL support) is vulnerable to remote OOB write attack via connection request after exhausting memory pool.
How severe is CVE-2021-26530?
CVE-2021-26530 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26530?
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-2021-26475EPrints 3.4.2 exposes a reflected XSS opportunity in the via…6.1
- CVE-2021-26476EPrints 3.4.2 allows remote attackers to execute OS commands…9.8
- CVE-2021-26504Directory Traversal vulnerability in Foddy node-red-contrib-…7.5
- CVE-2021-26505Prototype pollution vulnerability in MrSwitch hello.js versi…9.8
- CVE-2021-26528The mg_http_serve_file function in Cesanta Mongoose HTTP ser…9.1
- CVE-2021-26529The mg_tls_init function in Cesanta Mongoose HTTPS server 7.…9.1
- CVE-2021-26539Apostrophe Technologies sanitize-html before 2.3.1 does not …5.3
- CVE-2021-26540Apostrophe Technologies sanitize-html before 2.3.2 does not …5.3
- CVE-2021-26541The gitlog function in src/index.ts in gitlog before 4.0.4 h…9.8
- CVE-2021-26543The "gitDiff" function in Wayfair git-parse <=1.0.4 has a co…8.8
- CVE-2021-26544Livy server version 0.7.0-incubating (only) is vulnerable to…5.4
- CVE-2021-26549An XSS issue was discovered in SmartFoxServer 2.17.0. Input …5.4
Are you affected by CVE-2021-26530?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST