CVE-2007-2553: Unspecified vulnerability in dop in HP Tru64 UNIX 5.1B-4, 5.1B-3, and 5.1A PK6 allows local users to gain priv

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HIGH 7.2MITIGATE

CVE-2007-2553 is a high-severity flaw (CVSS 7.2) affecting tru64. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unspecified vulnerability in dop in HP Tru64 UNIX 5.1B-4, 5.1B-3, and 5.1A PK6 allows local users to gain privileges via a large amount of data in the environment, as demonstrated by a long environment variable.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Published	2007-05-09
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: hp

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-05-09 17:19 UTCPublished CVE record published
2026-06-16 22:39 UTCUpdated Record last modified

hp tru64 MITIGATE

Affected: 5.1a pk6 · 5.1b3 · 5.1b4

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.1a

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: HP Tru64 5.0.1 - DOP Command Privilege Escalation

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-2007-2553?

tru64: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-2553 being exploited?

CVE-2007-2553 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-2007-2553 affect?

CVE-2007-2553 affects tru64. Severity is high (CVSS 7.2). Unspecified vulnerability in dop in HP Tru64 UNIX 5.1B-4, 5.1B-3, and 5.1A PK6 allows local users to gain privileges via a large amount of data in the environment, as demonstrated by a long environment variable.

How urgent is CVE-2007-2553?

Priority 45/100. High severity; Public exploit reference

Related CVEs

CVE-2008-4414 HIGH 7.2 MITIGATE Unspecified vulnerability in the AdvFS showfile command in HP Tru64 UNIX 5.1B-3 and 5.1B-4 allows local users
CVE-2007-6519 MEDIUM 4.9 MITIGATE Unspecified vulnerability in the File-on-File Mounting File System (FFM) in HP Tru64 UNIX 5.1B-4 and 5.1B-3 al
CVE-2007-2791 HIGH 10.0 MITIGATE Unspecified vulnerability in the Secure Shell (SSH) in HP Tru64 UNIX 5.1B-4 and 5.1B-3 allows remote attackers
CVE-2007-0805 LOW 2.1 MITIGATE The ps (/usr/ucb/ps) command on HP Tru64 UNIX 5.1 1885 allows local users to obtain sensitive information, inc
CVE-2006-6418 HIGH 7.2 MITIGATE Buffer overflow in the POSIX Threads library (libpthread) on HP Tru64 UNIX 4.0F PK8, 4.0G PK4, and 5.1A PK6 al

References

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