CVE-2021-35331

HIGH 7.8CVE-2021-35331 · Published 05/07/2021 · updated 17/06/2026

In short

CVE-2021-35331 is a HIGH (CVSS 7.8) vulnerability affecting tcl (tcl).
Chance of exploitation in the next 30 days (EPSS): 1.7%, higher than 77.1% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
tcl tcl	`= 8.6.11`	No fix yet

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

References

core.tcl-lang.org/tcl/info/28ef6c0c741408a2 · Exploit
core.tcl-lang.org/tcl/info/bad6cc213dfe8280 · Exploit
tcltk/tcl commit 4705dbd · Patch
sqlite.org/forum/info/7dcd751996c93ec9 · Exploit

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