CVE-2021-31516: This vulnerability allows remote attackers to execute arbitrary code on affected installations of Vector 35 Bi

This month

HIGH 7.8DOWNGRADE

CVE-2021-31516 is a high-severity flaw (CVSS 7.8) affecting binary ninja. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Vector 35 Binary Ninja 2.3.2660 (Build ID 88f343c3). User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of BNDB files. The issue results from the lack of validating the existence of an object prior to performing operations on t

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-416
Published	2021-06-29
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: vector35

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-06-29 15:15 UTCPublished CVE record published
2026-06-17 03:51 UTCUpdated Record last modified

vector35 binary ninja DOWNGRADE

Affected: 2.3.2660

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.2660

1. Check installed version

apt-cache policy binary-ninja || rpm -q binary-ninja || binary-ninja --version

2. No fixed release: DOWNGRADE to a release before 2.3.2660 (Debian / Ubuntu)

apt-cache madison binary-ninja sudo apt install binary-ninja=<VERSION_BEFORE_2.3.2660> sudo apt-mark hold binary-ninja

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list binary-ninja sudo dnf downgrade binary-ninja-<VERSION_BEFORE_2.3.2660> sudo dnf versionlock add binary-ninja

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-31516?

binary ninja: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-31516 being exploited?

CVE-2021-31516 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-31516 affect?

CVE-2021-31516 affects binary ninja. Severity is high (CVSS 7.8). This vulnerability allows remote attackers to execute arbitrary code on affected installations of Vector 35 Binary Ninja 2.3.2660 (Build ID 88f343c3). User interaction is required to exploit this vulnerability in that the target must visit

How urgent is CVE-2021-31516?

Priority 48/100. High severity

Related CVEs

CVE-2021-31515 HIGH 7.8 DOWNGRADE This vulnerability allows remote attackers to execute arbitrary code on affected installations of Vector 35 Bi

References

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