How severe is CVE-2021-28835?

CVE-2021-28835 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-28835 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28835?

CVE-2021-28835 affects Xnview. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28835?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-28835 published?

CVE-2021-28835 was published on 2023-08-11 and last updated on 2026-06-17.

CVE-2021-28835

CVE-2021-28835 is a high-severity vulnerability in Xnview with a CVSS 3.x base score of 7.8. 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-120.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Xnview
Published: 2023-08-11
Last modified: 2026-06-17

Description

Buffer Overflow vulnerability in XNView before 2.50, allows local attackers to execute arbitrary code via crafted GEM bitmap file.

Frequently asked questions

What is CVE-2021-28835?: Buffer Overflow vulnerability in XNView before 2.50, allows local attackers to execute arbitrary code via crafted GEM bitmap file.
How severe is CVE-2021-28835?: CVE-2021-28835 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-28835 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28835?: CVE-2021-28835 affects Xnview. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28835?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-28835 published?: CVE-2021-28835 was published on 2023-08-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:xnview:xnview:*:*:*:*:*:*:*:*

More vulnerabilities in Xnview

CVE-2013-3493 — Critical (CVSS 9.8): XnView 2.03 has an integer overflow vulnerability
CVE-2013-3492 — Critical (CVSS 9.8): XnView 2.03 has a stack-based buffer overflow vulnerability
CVE-2013-3941 — Critical (CVSS 9.8): Xjp2.dll in XnView before 2.13 allows remote attackers to execute arbitrary code via (1) the Csiz parameter in a SIZ…
CVE-2012-4988 — Critical (CVSS 9.3): Heap-based buffer overflow in the xjpegls.dll (aka JLS, JPEG-LS, or JPEG lossless) format plugin in XnView 1.99 and…
CVE-2013-3938 — Critical (CVSS 9.3): Integer overflow in xnview.exe in XnView 2.13 allows remote attackers to execute arbitrary code via a large…
CVE-2013-2577 — Critical (CVSS 9.3): Buffer overflow in XnView before 2.04 allows remote attackers to execute arbitrary code via a crafted PCT file.

All CVEs affecting Xnview →

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