CVE-2022-21675: Bytecode Viewer (BCV) is a Java/Android reverse engineering suite

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CRITICAL 9.9UPGRADE

CVE-2022-21675 is a critical-severity flaw (CVSS 9.9) affecting bytecode viewer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Bytecode Viewer (BCV) is a Java/Android reverse engineering suite. Versions of the package prior to 2.11.0 are vulnerable to Arbitrary File Write via Archive Extraction (AKA "Zip Slip"). The vulnerability is exploited using a specially crafted archive that holds directory traversal filenames (e.g. ../../evil.exe). The Zip Slip vulnerability can affect numerous archive formats, including zip, jar, tar, war, cpio, apk, rar and 7z. The attacker can

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-22
Published	2022-01-12
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: bytecode viewer project

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

Am I affected?

Timeline

2022-01-12 19:15 UTCPublished CVE record published
2026-06-17 04:26 UTCUpdated Record last modified

bytecode viewer project bytecode viewer UPGRADE

Affected: >= 2.10.16 and < 2.11.0

Fixed in: 2.11.0

Safe to downgrade to: a release before 2.10.16

1. Check installed version

apt-cache policy bytecode-viewer || rpm -q bytecode-viewer || bytecode-viewer --version

2. UPGRADE to 2.11.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bytecode-viewer

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bytecode-viewer

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.10.16 (Debian / Ubuntu)

apt-cache madison bytecode-viewer sudo apt install bytecode-viewer=<VERSION_BEFORE_2.10.16> sudo apt-mark hold bytecode-viewer

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list bytecode-viewer sudo dnf downgrade bytecode-viewer-<VERSION_BEFORE_2.10.16> sudo dnf versionlock add bytecode-viewer

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-2022-21675?

bytecode viewer: upgrade to 2.11.0. Exact commands for each OS are on this page.

Is CVE-2022-21675 being exploited?

CVE-2022-21675 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-2022-21675 affect?

CVE-2022-21675 affects bytecode viewer. Severity is critical (CVSS 9.9). Bytecode Viewer (BCV) is a Java/Android reverse engineering suite. Versions of the package prior to 2.11.0 are vulnerable to Arbitrary File Write via Archive Extraction (AKA "Zip Slip"). The vulnerability is exploited using a specially craf

How urgent is CVE-2022-21675?

Priority 56/100. Critical severity

Software pages

Java vulnerabilities · Android vulnerabilities

References

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