CVE-2021-35331
HIGHCVSS 7.8/10EPSS 1.64%
Last modified
CVE-2021-35331 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In Tcl 8.6.11, a format string vulnerability in nmakehlp.c might allow code execution via a crafted file. NOTE: multiple third parties dispute the significance of this finding. EPSS estimates a 1.64% chance of exploitation in the next 30 days.
Description
In Tcl 8.6.11, a format string vulnerability in nmakehlp.c might allow code execution via a crafted file. NOTE: multiple third parties dispute the significance of this finding
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Tcl | Tcl | 8.6.11 |
References
- https://core.tcl-lang.org/tcl/info/28ef6c0c741408a2Exploit, Patch, Vendor Advisory
- https://core.tcl-lang.org/tcl/info/bad6cc213dfe8280Exploit, Vendor Advisory
- https://github.com/tcltk/tcl/commit/4705dbdde2f32ff90420765cd93e7ac71d81a222Patch, Third Party Advisory
- https://sqlite.org/forum/info/7dcd751996c93ec9Exploit, Third Party Advisory
- https://core.tcl-lang.org/tcl/info/28ef6c0c741408a2Exploit, Patch, Vendor Advisory
- https://core.tcl-lang.org/tcl/info/bad6cc213dfe8280Exploit, Vendor Advisory
- https://github.com/tcltk/tcl/commit/4705dbdde2f32ff90420765cd93e7ac71d81a222Patch, Third Party Advisory
- https://sqlite.org/forum/info/7dcd751996c93ec9Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-35331?
In Tcl 8.6.11, a format string vulnerability in nmakehlp.c might allow code execution via a crafted file. NOTE: multiple third parties dispute the significance of this finding
How severe is CVE-2021-35331?
CVE-2021-35331 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.64% probability of exploitation in the next 30 days.
How do I fix CVE-2021-35331?
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.
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Are you affected by CVE-2021-35331?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST