How severe is CVE-2005-0366?

CVE-2005-0366 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2005-0366 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-0366?

CVE-2005-0366 affects Gnupg. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2005-0366?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2005-0366 published?

CVE-2005-0366 was published on 2005-05-02 and last updated on 2026-06-16.

CVE-2005-0366

CVE-2005-0366 is a medium-severity vulnerability in Gnupg with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-326.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-326
Affected product: Gnupg
Published: 2005-05-02
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2005-0366?: 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.
How severe is CVE-2005-0366?: CVE-2005-0366 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2005-0366 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-0366?: CVE-2005-0366 affects Gnupg. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2005-0366?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-0366 published?: CVE-2005-0366 was published on 2005-05-02 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:gnupg:gnupg:*:*:*:*:*:*:*:*

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