CVE-1999-0920Imap Vulnerability
Buffer overflow in the pop-2d POP daemon in the IMAP package allows remote attackers to gain privileges via the FOLD command.
Published May 26, 1999 · Updated Apr 15, 2026
Key Facts
Patch immediately- CVE-1999-0920 is a critical-severity vulnerability (CVSS 10.0 v2) affecting Imap (University Of Washington), Pop2d (University Of Washington).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 32% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
10.0
AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
32%
Higher than 98.3% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
37/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Description
Buffer overflow in the pop-2d POP daemon in the IMAP package allows remote attackers to gain privileges via the FOLD command.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ImapUniversity Of Washington | 4.4 | n/a |
| Pop2dUniversity Of Washington | See advisory | n/a |
Timeline
Publicly disclosed
May 26, 1999
Last updated
Apr 15, 2026
References
- exploitExploitDB-19226
- other283
FAQ
Common Questions.
Buffer overflow in the pop-2d POP daemon in the IMAP package allows remote attackers to gain privileges via the FOLD command.
Affected: Imap (University Of Washington) versions 4.4; Pop2d (University Of Washington). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-1999-0920 On Your Attack Surface?
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