CVE-2021-33293: Panorama Tools libpano13 v2.9.20 was discovered to contain an out-of-bounds read in the function panoParserFin

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CRITICAL 9.1REMOTEWATCHLISTDOWNGRADEMITIGATE

CVE-2021-33293 is a critical-severity flaw (CVSS 9.1) affecting libpano13, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Panorama Tools libpano13 v2.9.20 was discovered to contain an out-of-bounds read in the function panoParserFindOLine() in parser.c.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

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

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-125
Published	2022-03-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · libpano13 project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-03-10 17:42 UTCPublished CVE record published
2026-06-17 03:54 UTCUpdated Record last modified

libpano13 project libpano13 DOWNGRADE

Affected: 2.9.20

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.9.20

1. Check installed version

apt-cache policy libpano13 || rpm -q libpano13 || libpano13 --version

2. No fixed release: DOWNGRADE to a release before 2.9.20 (Debian / Ubuntu)

apt-cache madison libpano13 sudo apt install libpano13=<VERSION_BEFORE_2.9.20> sudo apt-mark hold libpano13

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list libpano13 sudo dnf downgrade libpano13-<VERSION_BEFORE_2.9.20> sudo dnf versionlock add libpano13

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

debian debian linux MITIGATE

Affected: 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0

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.

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-2021-33293?

libpano13: downgrade or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-33293 being exploited?

CVE-2021-33293 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-2021-33293 affect?

CVE-2021-33293 affects libpano13, debian linux. Severity is critical (CVSS 9.1). Panorama Tools libpano13 v2.9.20 was discovered to contain an out-of-bounds read in the function panoParserFindOLine() in parser.c.

How urgent is CVE-2021-33293?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2021-33798 MEDIUM 4.7 DOWNGRADE A null pointer dereference was found in libpano13, version libpano13-2.9.20

References

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