CVE-2005-0366

Q: How do I fix CVE-2005-0366?

Upgrade gnupg to 1.4.1 or later.

Q: Is CVE-2005-0366 being actively exploited?

Not that we know of. CVE-2005-0366 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.9% is the estimated probability that it will be exploited in the next 30 days. That is higher than 86% of all scored CVEs.

Q: How severe is CVE-2005-0366?

CVE-2005-0366 has a CVSS v2 base score of 5.0, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2005-0366 affect?

Published advisories record a fix for gnupg (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUMEPSS 86th pctl

5.0

CVSS v2

NVD

Description

The integrity check feature in OpenPGP, when handling a message that was encrypted using cipher feedback (CFB) mode, allows remote attackers to recover part of the plaintext via a chosen-ciphertext attack when the first 2 bytes of a message block are known, and an oracle or other mechanism is available to determine whether an integrity check failed.

CWE-326

How to fix

Remediation Available

gnupgNVD

Affected:< 1.4.1Fixed in:1.4.1CVE-2005-0366derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

2.95%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Third-Party Advisory6

Other references4

Related Vulnerabilities

Other CWE-326 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0224	High	7.4	95%	-	Fix
CVE-2017-1000486	Critical	9.8	94%	KEV	Fix
CVE-2013-2566	Medium	5.9	84%	-	Fix
CVE-2017-11317	Critical	9.8	83%	KEV	-
CVE-2018-18325	High	7.5	74%	KEV	-
CVE-2018-15811	High	7.5	74%	KEV	-

Common questions

How do I fix CVE-2005-0366?

Upgrade gnupg to 1.4.1 or later.

Is CVE-2005-0366 being actively exploited?

Not that we know of. CVE-2005-0366 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.9% is the estimated probability that it will be exploited in the next 30 days. That is higher than 86% of all scored CVEs.

How severe is CVE-2005-0366?

CVE-2005-0366 has a CVSS v2 base score of 5.0, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2005-0366 affect?

Published advisories record a fix for gnupg (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.