CVE-2020-28963: Passcovery Co

This month

HIGH 7.8DOWNGRADE

CVE-2020-28963 is a high-severity flaw (CVSS 7.8) affecting zip password recovery. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Passcovery Co. Ltd ZIP Password Recovery v3.70.69.0 was discovered to contain a buffer overflow via the decompress function.

Why this priority

High severity
Public exploit reference

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	Low
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-120
Published	2021-10-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: krylack

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

Am I affected?

Timeline

2021-10-22 20:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

krylack zip password recovery DOWNGRADE

Affected: 3.70.69.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.70.69.0

1. Check installed version

apt-cache policy zip-password-recovery || rpm -q zip-password-recovery || zip-password-recovery --version

2. No fixed release: DOWNGRADE to a release before 3.70.69.0 (Debian / Ubuntu)

apt-cache madison zip-password-recovery sudo apt install zip-password-recovery=<VERSION_BEFORE_3.70.69.0> sudo apt-mark hold zip-password-recovery

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

dnf --showduplicates list zip-password-recovery sudo dnf downgrade zip-password-recovery-<VERSION_BEFORE_3.70.69.0> sudo dnf versionlock add zip-password-recovery

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-2020-28963?

zip password recovery: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-28963 being exploited?

CVE-2020-28963 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-2020-28963 affect?

CVE-2020-28963 affects zip password recovery. Severity is high (CVSS 7.8). Passcovery Co. Ltd ZIP Password Recovery v3.70.69.0 was discovered to contain a buffer overflow via the decompress function.

How urgent is CVE-2020-28963?

Priority 41/100. High severity; Public exploit reference

References

← Back to latest CVEs