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CVE-2006-5556

21
FAUCET Score

CVE-2006-5556 describes a buffer overflow vulnerability in the localtime_r function within libc on HP-UX B.11.11, and potentially other versions. This flaw allows local users to execute arbitrary code by supplying an overly long TZ environment variable. With a CVSS score of 4.6, this vulnerability has a low attack complexity and requires local access, but can lead to partial confidentiality, integrity, and availability impacts. While not listed in the KEV catalog, an exploit for privilege escalation is available on ExploitDB, though there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
11.00CPE matchmatch criteria
cpe:2.3:o:hp:hp-ux:11.00:*:*:*:*:*:*:*
11.4CPE matchmatch criteria
cpe:2.3:o:hp:hp-ux:11.4:*:*:*:*:*:*:*
11.11CPE matchmatch criteria
cpe:2.3:o:hp:hp-ux:11.11:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.6MEDIUM

AV:L/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.30%
Probability of exploitation in next 30 days
EPSS Percentile
67.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-2636 · Oct 24, 2006
This CVE's current EPSS score of 0.0130 is in the 93rd percentile among its peer group of 3,052 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

blogs.23.nu / prdelka/stories/13144
Exploit
exchange.xforce.ibmcloud.com / vulnerabilities/29777
exploit-db.com / exploits/2636
securityfocus.com / bid/20718
ExploitPatch